389661408 has 48 divisors (see below), whose sum is σ = 1136514960. Its totient is φ = 129886848.

The previous prime is 389661401. The next prime is 389661421. The reversal of 389661408 is 804166983.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (389661401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 224635 + ... + 226362.

It is an arithmetic number, because the mean of its divisors is an integer number (23677395).

Almost surely, 2^389661408 is an apocalyptic number.

It is an amenable number.

389661408 is an abundant number, since it is smaller than the sum of its proper divisors (746853552).

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

389661408 is a wasteful number, since it uses less digits than its factorization.

389661408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 451016 (or 451002 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 45.

The square root of 389661408 is about 19739.8431604712. The cubic root of 389661408 is about 730.4028601399.

The spelling of 389661408 in words is "three hundred eighty-nine million, six hundred sixty-one thousand, four hundred eight".