156989910 has 64 divisors (see below), whose sum is σ = 469753344. Its totient is φ = 32620800.

The previous prime is 156989887. The next prime is 156989929. The reversal of 156989910 is 19989651.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 156989910.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 31671 + ... + 36290.

It is an arithmetic number, because the mean of its divisors is an integer number (7339896).

Almost surely, 2^156989910 is an apocalyptic number.

156989910 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

156989910 is an abundant number, since it is smaller than the sum of its proper divisors (312763434).

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

156989910 is a wasteful number, since it uses less digits than its factorization.

156989910 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67989.

The product of its (nonzero) digits is 174960, while the sum is 48.

The square root of 156989910 is about 12529.5614448392. The cubic root of 156989910 is about 539.4575141843.

The spelling of 156989910 in words is "one hundred fifty-six million, nine hundred eighty-nine thousand, nine hundred ten".