389401908 has 48 divisors (see below), whose sum is σ = 1074218880. Its totient is φ = 107420544.

The previous prime is 389401907. The next prime is 389401921. The reversal of 389401908 is 809104983.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 389401908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (389401907) 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, 77491 + ... + 82362.

It is an arithmetic number, because the mean of its divisors is an integer number (22379560).

Almost surely, 2^389401908 is an apocalyptic number.

It is an amenable number.

389401908 is an abundant number, since it is smaller than the sum of its proper divisors (684816972).

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

389401908 is a wasteful number, since it uses less digits than its factorization.

389401908 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159896 (or 159894 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 42.

The square root of 389401908 is about 19733.2690652107. The cubic root of 389401908 is about 730.2406837570.

The spelling of 389401908 in words is "three hundred eighty-nine million, four hundred one thousand, nine hundred eight".