156839940 has 72 divisors (see below), whose sum is σ = 485896320. Its totient is φ = 40931904.

The previous prime is 156839867. The next prime is 156839941. The reversal of 156839940 is 49938651.

It is a happy number.

156839940 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is not an unprimeable number, because it can be changed into a prime (156839941) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 810 + ... + 17729.

It is an arithmetic number, because the mean of its divisors is an integer number (6748560).

Almost surely, 2^156839940 is an apocalyptic number.

156839940 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 156839940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (242948160).

156839940 is an abundant number, since it is smaller than the sum of its proper divisors (329056380).

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

156839940 is a wasteful number, since it uses less digits than its factorization.

156839940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18601 (or 18596 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 45.

The square root of 156839940 is about 12523.5753680808. The cubic root of 156839940 is about 539.2856810207.

The spelling of 156839940 in words is "one hundred fifty-six million, eight hundred thirty-nine thousand, nine hundred forty".