156870138 has 32 divisors (see below), whose sum is σ = 319104576. Its totient is φ = 51401088.

The previous prime is 156870127. The next prime is 156870139. The reversal of 156870138 is 831078651.

It is a super-2 number, since 2×156870138² = 49216480392278088, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 156870096 and 156870105.

It is not an unprimeable number, because it can be changed into a prime (156870139) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 243645 + ... + 244287.

It is an arithmetic number, because the mean of its divisors is an integer number (9972018).

Almost surely, 2^156870138 is an apocalyptic number.

156870138 is an abundant number, since it is smaller than the sum of its proper divisors (162234438).

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

156870138 is a wasteful number, since it uses less digits than its factorization.

156870138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1278.

The product of its (nonzero) digits is 40320, while the sum is 39.

The square root of 156870138 is about 12524.7809561685. The cubic root of 156870138 is about 539.3202901981.

The spelling of 156870138 in words is "one hundred fifty-six million, eight hundred seventy thousand, one hundred thirty-eight".