156117090 has 32 divisors (see below), whose sum is σ = 383397696. Its totient is φ = 40662720.

The previous prime is 156117089. The next prime is 156117151. The reversal of 156117090 is 90711651.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

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, 59221 + ... + 61800.

It is an arithmetic number, because the mean of its divisors is an integer number (11981178).

Almost surely, 2^156117090 is an apocalyptic number.

156117090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

156117090 is an abundant number, since it is smaller than the sum of its proper divisors (227280606).

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

156117090 is a wasteful number, since it uses less digits than its factorization.

156117090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121074.

The product of its (nonzero) digits is 1890, while the sum is 30.

The square root of 156117090 is about 12494.6824689545. The cubic root of 156117090 is about 538.4559113645.

The spelling of 156117090 in words is "one hundred fifty-six million, one hundred seventeen thousand, ninety".