389723136 has 176 divisors, whose sum is σ = 1194792960. Its totient is φ = 111697920.

The previous prime is 389723123. The next prime is 389723137. The reversal of 389723136 is 631327983.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (176).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (389723137) 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, 641745 + ... + 642351.

Almost surely, 2^389723136 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 389723136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (597396480).

389723136 is an abundant number, since it is smaller than the sum of its proper divisors (805069824).

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

389723136 is a wasteful number, since it uses less digits than its factorization.

389723136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 660 (or 642 counting only the distinct ones).

The product of its digits is 163296, while the sum is 42.

The square root of 389723136 is about 19741.4066368129. The cubic root of 389723136 is about 730.4414268941.

The spelling of 389723136 in words is "three hundred eighty-nine million, seven hundred twenty-three thousand, one hundred thirty-six".