389943900 has 54 divisors (see below), whose sum is σ = 1222260312. Its totient is φ = 103984800.

The previous prime is 389943899. The next prime is 389943937. The reversal of 389943900 is 9349983.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 215736 + ... + 217535.

Almost surely, 2^389943900 is an apocalyptic number.

389943900 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

389943900 is an abundant number, since it is smaller than the sum of its proper divisors (832316412).

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

389943900 is a wasteful number, since it uses less digits than its factorization.

389943900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 433291 (or 433281 counting only the distinct ones).

The product of its (nonzero) digits is 209952, while the sum is 45.

The square root of 389943900 is about 19746.9972400869. The cubic root of 389943900 is about 730.5793237047.

The spelling of 389943900 in words is "three hundred eighty-nine million, nine hundred forty-three thousand, nine hundred".