156438870 has 128 divisors (see below), whose sum is σ = 457574400. Its totient is φ = 34151040.

The previous prime is 156438857. The next prime is 156438899. The reversal of 156438870 is 78834651.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 236340 + ... + 237000.

It is an arithmetic number, because the mean of its divisors is an integer number (3574800).

Almost surely, 2^156438870 is an apocalyptic number.

156438870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 156438870, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (228787200).

156438870 is an abundant number, since it is smaller than the sum of its proper divisors (301135530).

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

156438870 is a wasteful number, since it uses less digits than its factorization.

156438870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 715 (or 701 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 42.

The square root of 156438870 is about 12507.5525183786. The cubic root of 156438870 is about 538.8256027679.

The spelling of 156438870 in words is "one hundred fifty-six million, four hundred thirty-eight thousand, eight hundred seventy".