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120232220 = 22561139709
BaseRepresentation
bin1110010101010…
…01100100011100
322101020102121012
413022221210130
5221234412340
615532554352
72656646153
oct712514434
9271212535
10120232220
1161960279
12343229b8
131bba8834
1411d7a59a
15a84e565
hex72a991c

120232220 has 48 divisors (see below), whose sum is σ = 258837600. Its totient is φ = 46897920.

The previous prime is 120232219. The next prime is 120232243. The reversal of 120232220 is 22232021.

It is a super-2 number, since 2×1202322202 = 28911573452256800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 120232195 and 120232204.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 169226 + ... + 169934.

It is an arithmetic number, because the mean of its divisors is an integer number (5392450).

Almost surely, 2120232220 is an apocalyptic number.

120232220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

120232220 is an abundant number, since it is smaller than the sum of its proper divisors (138605380).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

120232220 is a wasteful number, since it uses less digits than its factorization.

120232220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 918 (or 916 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 120232220 is about 10965.0453715432. The cubic root of 120232220 is about 493.5603786099.

Adding to 120232220 its reverse (22232021), we get a palindrome (142464241).

The spelling of 120232220 in words is "one hundred twenty million, two hundred thirty-two thousand, two hundred twenty".

Divisors: 1 2 4 5 10 20 61 122 139 244 278 305 556 610 695 709 1220 1390 1418 2780 2836 3545 7090 8479 14180 16958 33916 42395 43249 84790 86498 98551 169580 172996 197102 216245 394204 432490 492755 864980 985510 1971020 6011611 12023222 24046444 30058055 60116110 120232220