389992530 has 32 divisors (see below), whose sum is σ = 944737344. Its totient is φ = 103025216.

The previous prime is 389992523. The next prime is 389992573. The reversal of 389992530 is 35299983.

It is a self number, because there is not a number n which added to its sum of digits gives 389992530.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57537 + ... + 63956.

It is an arithmetic number, because the mean of its divisors is an integer number (29523042).

Almost surely, 2^389992530 is an apocalyptic number.

389992530 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

389992530 is an abundant number, since it is smaller than the sum of its proper divisors (554744814).

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

389992530 is a wasteful number, since it uses less digits than its factorization.

389992530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121610.

The product of its (nonzero) digits is 524880, while the sum is 48.

The square root of 389992530 is about 19748.2285281491. The cubic root of 389992530 is about 730.6096926848.

The spelling of 389992530 in words is "three hundred eighty-nine million, nine hundred ninety-two thousand, five hundred thirty".