6402636 has 36 divisors (see below), whose sum is σ = 16266432. Its totient is φ = 2123424.

The previous prime is 6402631. The next prime is 6402653. The reversal of 6402636 is 6362046.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6402631) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10245 + ... + 10851.

Almost surely, 2^6402636 is an apocalyptic number.

It is an amenable number.

6402636 is an abundant number, since it is smaller than the sum of its proper divisors (9863796).

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

6402636 is a wasteful number, since it uses less digits than its factorization.

6402636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 910 (or 905 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

The square root of 6402636 is about 2530.3430597451. The cubic root of 6402636 is about 185.6890399044.

The spelling of 6402636 in words is "six million, four hundred two thousand, six hundred thirty-six".