156439660 has 48 divisors (see below), whose sum is σ = 357499296. Its totient is φ = 57157632.

The previous prime is 156439651. The next prime is 156439669. The reversal of 156439660 is 66934651.

It is an interprime number because it is at equal distance from previous prime (156439651) and next prime (156439669).

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (156439669) 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, 22119 + ... + 28321.

It is an arithmetic number, because the mean of its divisors is an integer number (7447902).

Almost surely, 2^156439660 is an apocalyptic number.

156439660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 156439660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (178749648).

156439660 is an abundant number, since it is smaller than the sum of its proper divisors (201059636).

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

156439660 is a wasteful number, since it uses less digits than its factorization.

156439660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6322 (or 6320 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 40.

The square root of 156439660 is about 12507.5840992575. The cubic root of 156439660 is about 538.8265097708.

The spelling of 156439660 in words is "one hundred fifty-six million, four hundred thirty-nine thousand, six hundred sixty".