156989238 has 48 divisors (see below), whose sum is σ = 377855280. Its totient is φ = 43305024.

The previous prime is 156989197. The next prime is 156989251. The reversal of 156989238 is 832989651.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 681 + ... + 17732.

It is an arithmetic number, because the mean of its divisors is an integer number (7871985).

Almost surely, 2^156989238 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 156989238, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (188927640).

156989238 is an abundant number, since it is smaller than the sum of its proper divisors (220866042).

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

156989238 is a wasteful number, since it uses less digits than its factorization.

156989238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18461 (or 18454 counting only the distinct ones).

The product of its digits is 933120, while the sum is 51.

The square root of 156989238 is about 12529.5346282294. The cubic root of 156989238 is about 539.4567444619.

The spelling of 156989238 in words is "one hundred fifty-six million, nine hundred eighty-nine thousand, two hundred thirty-eight".