389138892 has 24 divisors (see below), whose sum is σ = 911894256. Its totient is φ = 129155328.

The previous prime is 389138861. The next prime is 389138899. The reversal of 389138892 is 298831983.

It is not an unprimeable number, because it can be changed into a prime (389138899) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66793 + ... + 72384.

It is an arithmetic number, because the mean of its divisors is an integer number (37995594).

Almost surely, 2^389138892 is an apocalyptic number.

It is an amenable number.

389138892 is an abundant number, since it is smaller than the sum of its proper divisors (522755364).

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

389138892 is a wasteful number, since it uses less digits than its factorization.

389138892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139417 (or 139415 counting only the distinct ones).

The product of its digits is 746496, while the sum is 51.

The square root of 389138892 is about 19726.6036610462. The cubic root of 389138892 is about 730.0762364867.

The spelling of 389138892 in words is "three hundred eighty-nine million, one hundred thirty-eight thousand, eight hundred ninety-two".