1389579992 has 16 divisors (see below), whose sum is σ = 2675880960. Its totient is φ = 676011744.

The previous prime is 1389579943. The next prime is 1389580001. The reversal of 1389579992 is 2999759831.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2346968 + ... + 2347559.

It is an arithmetic number, because the mean of its divisors is an integer number (167242560).

Almost surely, 2^1389579992 is an apocalyptic number.

It is an amenable number.

1389579992 is a deficient number, since it is larger than the sum of its proper divisors (1286300968).

1389579992 is a wasteful number, since it uses less digits than its factorization.

1389579992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4694570 (or 4694566 counting only the distinct ones).

The product of its digits is 11022480, while the sum is 62.

The square root of 1389579992 is about 37277.0705930603. The cubic root of 1389579992 is about 1115.9066116618.

The spelling of 1389579992 in words is "one billion, three hundred eighty-nine million, five hundred seventy-nine thousand, nine hundred ninety-two".