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109213780 = 225131724709
BaseRepresentation
bin1101000001001…
…11100001010100
321121111122010211
412200213201110
5210424320110
614500455204
72464205344
oct640474124
9247448124
10109213780
1156714a25
12306aa504
131981b550
141070cd24
1598c498a
hex6827854

109213780 has 48 divisors (see below), whose sum is σ = 261530640. Its totient is φ = 37951488.

The previous prime is 109213757. The next prime is 109213789. The reversal of 109213780 is 87312901.

It can be written as a sum of positive squares in 8 ways, for example, as 94864 + 109118916 = 308^2 + 10446^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109213789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7935 + ... + 16774.

It is an arithmetic number, because the mean of its divisors is an integer number (5448555).

Almost surely, 2109213780 is an apocalyptic number.

109213780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

109213780 is an abundant number, since it is smaller than the sum of its proper divisors (152316860).

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

109213780 is a wasteful number, since it uses less digits than its factorization.

109213780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24748 (or 24746 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 31.

The square root of 109213780 is about 10450.5396989821. The cubic root of 109213780 is about 477.9977066118.

The spelling of 109213780 in words is "one hundred nine million, two hundred thirteen thousand, seven hundred eighty".

Divisors: 1 2 4 5 10 13 17 20 26 34 52 65 68 85 130 170 221 260 340 442 884 1105 2210 4420 24709 49418 98836 123545 247090 321217 420053 494180 642434 840106 1284868 1606085 1680212 2100265 3212170 4200530 5460689 6424340 8401060 10921378 21842756 27303445 54606890 109213780