389192490 has 48 divisors (see below), whose sum is σ = 1014743808. Its totient is φ = 103493088.

The previous prime is 389192483. The next prime is 389192513. The reversal of 389192490 is 94291983.

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

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27139 + ... + 38921.

It is an arithmetic number, because the mean of its divisors is an integer number (21140496).

Almost surely, 2^389192490 is an apocalyptic number.

389192490 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

389192490 is an abundant number, since it is smaller than the sum of its proper divisors (625551318).

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

389192490 is a wasteful number, since it uses less digits than its factorization.

389192490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12163 (or 12160 counting only the distinct ones).

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

The square root of 389192490 is about 19727.9621350002. The cubic root of 389192490 is about 730.1097539364.

The spelling of 389192490 in words is "three hundred eighty-nine million, one hundred ninety-two thousand, four hundred ninety".