6389992 has 24 divisors (see below), whose sum is σ = 13938210. Its totient is φ = 2738400.

The previous prime is 6389989. The next prime is 6389993. The reversal of 6389992 is 2999836.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 4468996 + 1920996 = 2114^2 + 1386^2 .

It is not an unprimeable number, because it can be changed into a prime (6389993) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7759 + ... + 8542.

Almost surely, 2^6389992 is an apocalyptic number.

It is an amenable number.

6389992 is an abundant number, since it is smaller than the sum of its proper divisors (7548218).

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

6389992 is a wasteful number, since it uses less digits than its factorization.

6389992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16321 (or 16310 counting only the distinct ones).

The product of its digits is 209952, while the sum is 46.

The square root of 6389992 is about 2527.8433495769. The cubic root of 6389992 is about 185.5667257284.

It can be divided in two parts, 6389 and 992, that added together give a triangular number (7381 = T₁₂₁).

The spelling of 6389992 in words is "six million, three hundred eighty-nine thousand, nine hundred ninety-two".