6400090908 has 60 divisors (see below), whose sum is σ = 16842032592. Its totient is φ = 2119219200.

The previous prime is 6400090877. The next prime is 6400090933. The reversal of 6400090908 is 8090900046.

6400090908 is a `hidden beast` number, since 640 + 0 + 0 + 9 + 0 + 9 + 0 + 8 = 666.

It is a super-2 number, since 2×6400090908² = 81922327261328528928, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 16485 + ... + 114332.

Almost surely, 2^6400090908 is an apocalyptic number.

It is an amenable number.

6400090908 is an abundant number, since it is smaller than the sum of its proper divisors (10441941684).

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

6400090908 is a wasteful number, since it uses less digits than its factorization.

6400090908 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130984 (or 130973 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 6400090908 is about 80000.5681729824. The cubic root of 6400090908 is about 1856.6443241859.

The spelling of 6400090908 in words is "six billion, four hundred million, ninety thousand, nine hundred eight".