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1220002220 = 22561000111
BaseRepresentation
bin100100010110111…
…1100000110101100
310011000122112102102
41020231330012230
54444310032340
6321020514232
742142563533
oct11055740654
93130575372
101220002220
115767287a8
122a06ab978
131659a8908
14b805931a
157218c215
hex48b7c1ac

1220002220 has 12 divisors (see below), whose sum is σ = 2562004704. Its totient is φ = 488000880.

The previous prime is 1220002219. The next prime is 1220002237. The reversal of 1220002220 is 222000221.

1220002220 is a modest number, since divided by 2220 gives 1220 as remainder.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30500036 + ... + 30500075.

It is an arithmetic number, because the mean of its divisors is an integer number (213500392).

Almost surely, 21220002220 is an apocalyptic number.

1220002220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1220002220 is an abundant number, since it is smaller than the sum of its proper divisors (1342002484).

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

1220002220 is a wasteful number, since it uses less digits than its factorization.

1220002220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61000120 (or 61000118 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 11.

The square root of 1220002220 is about 34928.5301723391. The cubic root of 1220002220 is about 1068.5303782731.

Adding to 1220002220 its reverse (222000221), we get a palindrome (1442002441).

The spelling of 1220002220 in words is "one billion, two hundred twenty million, two thousand, two hundred twenty".

Divisors: 1 2 4 5 10 20 61000111 122000222 244000444 305000555 610001110 1220002220