156855870 has 24 divisors (see below), whose sum is σ = 407825496. Its totient is φ = 41828208.

The previous prime is 156855869. The next prime is 156855893. The reversal of 156855870 is 78558651.

156855870 is a `hidden beast` number, since 1 + 5 + 68 + 5 + 587 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 871332 + ... + 871511.

It is an arithmetic number, because the mean of its divisors is an integer number (16992729).

Almost surely, 2^156855870 is an apocalyptic number.

156855870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

156855870 is an abundant number, since it is smaller than the sum of its proper divisors (250969626).

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

156855870 is a wasteful number, since it uses less digits than its factorization.

156855870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1742856 (or 1742853 counting only the distinct ones).

The product of its (nonzero) digits is 336000, while the sum is 45.

The square root of 156855870 is about 12524.2113524166. The cubic root of 156855870 is about 539.3039385514.

The spelling of 156855870 in words is "one hundred fifty-six million, eight hundred fifty-five thousand, eight hundred seventy".