6404632 has 16 divisors (see below), whose sum is σ = 12932640. Its totient is φ = 2955936.

The previous prime is 6404623. The next prime is 6404639. The reversal of 6404632 is 2364046.

It is a super-2 number, since 2×6404632² = 82038622110848, which contains 22 as substring.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 6404597 and 6404606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6404639) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30688 + ... + 30895.

It is an arithmetic number, because the mean of its divisors is an integer number (808290).

Almost surely, 2^6404632 is an apocalyptic number.

It is an amenable number.

6404632 is an abundant number, since it is smaller than the sum of its proper divisors (6528008).

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

6404632 is a wasteful number, since it uses less digits than its factorization.

6404632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61602 (or 61598 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 25.

The square root of 6404632 is about 2530.7374419327. The cubic root of 6404632 is about 185.7083338752.

Adding to 6404632 its reverse (2364046), we get a palindrome (8768678).

The spelling of 6404632 in words is "six million, four hundred four thousand, six hundred thirty-two".