389690520 has 32 divisors (see below), whose sum is σ = 1169071920. Its totient is φ = 103917440.

The previous prime is 389690479. The next prime is 389690563. The reversal of 389690520 is 25096983.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1623591 + ... + 1623830.

Almost surely, 2^389690520 is an apocalyptic number.

389690520 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

389690520 is an abundant number, since it is smaller than the sum of its proper divisors (779381400).

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

389690520 is a wasteful number, since it uses less digits than its factorization.

389690520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3247435 (or 3247431 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 42.

The square root of 389690520 is about 19740.5805385759. The cubic root of 389690520 is about 730.4210494004.

The spelling of 389690520 in words is "three hundred eighty-nine million, six hundred ninety thousand, five hundred twenty".