389291904 has 96 divisors (see below), whose sum is σ = 1127020440. Its totient is φ = 128977920.

The previous prime is 389291887. The next prime is 389291927. The reversal of 389291904 is 409192983.

It is a tau number, because it is divible by the number of its divisors (96).

It is a self number, because there is not a number n which added to its sum of digits gives 389291904.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 207579 + ... + 209445.

Almost surely, 2^389291904 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 389291904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (563510220).

389291904 is an abundant number, since it is smaller than the sum of its proper divisors (737728536).

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

389291904 is a wasteful number, since it uses less digits than its factorization.

389291904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2068 (or 2053 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 45.

The square root of 389291904 is about 19730.4815957442. The cubic root of 389291904 is about 730.1719142244.

The spelling of 389291904 in words is "three hundred eighty-nine million, two hundred ninety-one thousand, nine hundred four".