156908990 has 32 divisors (see below), whose sum is σ = 336821760. Its totient is φ = 51457824.

The previous prime is 156908959. The next prime is 156908993. The reversal of 156908990 is 99809651.

It is a super-2 number, since 2×156908990² = 49240862285640200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (156908993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47120 + ... + 50339.

It is an arithmetic number, because the mean of its divisors is an integer number (10525680).

Almost surely, 2^156908990 is an apocalyptic number.

156908990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

156908990 is an abundant number, since it is smaller than the sum of its proper divisors (179912770).

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

156908990 is a wasteful number, since it uses less digits than its factorization.

156908990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97496.

The product of its (nonzero) digits is 174960, while the sum is 47.

The square root of 156908990 is about 12526.3318653148. The cubic root of 156908990 is about 539.3648109772.

The spelling of 156908990 in words is "one hundred fifty-six million, nine hundred eight thousand, nine hundred ninety".