6402690 has 48 divisors (see below), whose sum is σ = 19027008. Its totient is φ = 1463328.

The previous prime is 6402661. The next prime is 6402701. The reversal of 6402690 is 962046.

It is a super-2 number, since 2×6402690² = 81988878472200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4452 + ... + 5711.

It is an arithmetic number, because the mean of its divisors is an integer number (396396).

Almost surely, 2^6402690 is an apocalyptic number.

6402690 is an abundant number, since it is smaller than the sum of its proper divisors (12624318).

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

6402690 is a wasteful number, since it uses less digits than its factorization.

6402690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10183 (or 10180 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 6402690 is about 2530.3537302124. The cubic root of 6402690 is about 185.6895619384.

The spelling of 6402690 in words is "six million, four hundred two thousand, six hundred ninety".