389231730 has 40 divisors (see below), whose sum is σ = 1046603052. Its totient is φ = 103794912.

The previous prime is 389231729. The next prime is 389231771. The reversal of 389231730 is 37132983.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 349428249 + 39803481 = 18693^2 + 6309^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 239457 + ... + 241076.

Almost surely, 2^389231730 is an apocalyptic number.

389231730 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

389231730 is an abundant number, since it is smaller than the sum of its proper divisors (657371322).

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

389231730 is a wasteful number, since it uses less digits than its factorization.

389231730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 480552 (or 480543 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The square root of 389231730 is about 19728.9566373896. The cubic root of 389231730 is about 730.1342906756.

The spelling of 389231730 in words is "three hundred eighty-nine million, two hundred thirty-one thousand, seven hundred thirty".