156989628 has 144 divisors (see below), whose sum is σ = 462309120. Its totient is φ = 44554752.

The previous prime is 156989627. The next prime is 156989671. The reversal of 156989628 is 826989651.

It is a happy number.

156989628 is a `hidden beast` number, since 1 + 5 + 6 + 9 + 8 + 9 + 628 = 666.

156989628 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (156989621) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 267151 + ... + 267737.

It is an arithmetic number, because the mean of its divisors is an integer number (3210480).

Almost surely, 2^156989628 is an apocalyptic number.

156989628 is a gapful number since it is divisible by the number (18) 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 156989628, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (231154560).

156989628 is an abundant number, since it is smaller than the sum of its proper divisors (305319492).

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

156989628 is a wasteful number, since it uses less digits than its factorization.

156989628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 656 (or 651 counting only the distinct ones).

The product of its digits is 1866240, while the sum is 54.

The square root of 156989628 is about 12529.5501914474. The cubic root of 156989628 is about 539.4571911761.

The spelling of 156989628 in words is "one hundred fifty-six million, nine hundred eighty-nine thousand, six hundred twenty-eight".