156885220 has 24 divisors (see below), whose sum is σ = 330027264. Its totient is φ = 62645856.

The previous prime is 156885173. The next prime is 156885227. The reversal of 156885220 is 22588651.

It is a super-2 number, since 2×156885220² = 49225944508896800, which contains 22 as substring.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 156885220.

It is not an unprimeable number, because it can be changed into a prime (156885227) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 5679 + ... + 18601.

It is an arithmetic number, because the mean of its divisors is an integer number (13751136).

Almost surely, 2^156885220 is an apocalyptic number.

156885220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

156885220 is an abundant number, since it is smaller than the sum of its proper divisors (173142044).

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

156885220 is a wasteful number, since it uses less digits than its factorization.

156885220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13539 (or 13537 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 37.

The square root of 156885220 is about 12525.3830280754. The cubic root of 156885220 is about 539.3375736404.

The spelling of 156885220 in words is "one hundred fifty-six million, eight hundred eighty-five thousand, two hundred twenty".