6404992 has 32 divisors (see below), whose sum is σ = 13923000. Its totient is φ = 2910720.

The previous prime is 6404987. The next prime is 6405011. The reversal of 6404992 is 2994046.

It is a tau number, because it is divible by the number of its divisors (32).

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, 867 + ... + 3682.

Almost surely, 2^6404992 is an apocalyptic number.

It is an amenable number.

6404992 is an abundant number, since it is smaller than the sum of its proper divisors (7518008).

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

6404992 is a wasteful number, since it uses less digits than its factorization.

6404992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4574 (or 4562 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 6404992 is about 2530.8085664467. The cubic root of 6404992 is about 185.7118133230.

It can be divided in two parts, 6404 and 992, that added together give a square (7396 = 86²).

The spelling of 6404992 in words is "six million, four hundred four thousand, nine hundred ninety-two".