6408399172 has 24 divisors (see below), whose sum is σ = 12917725184. Its totient is φ = 2724829632.

The previous prime is 6408399157. The next prime is 6408399181. The reversal of 6408399172 is 2719938046.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 897513 + ... + 904624.

Almost surely, 2^6408399172 is an apocalyptic number.

It is an amenable number.

6408399172 is an abundant number, since it is smaller than the sum of its proper divisors (6509326012).

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

6408399172 is a wasteful number, since it uses less digits than its factorization.

6408399172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1802275 (or 1802273 counting only the distinct ones).

The product of its (nonzero) digits is 653184, while the sum is 49.

The square root of 6408399172 is about 80052.4776131258. The cubic root of 6408399172 is about 1857.4473763808.

The spelling of 6408399172 in words is "six billion, four hundred eight million, three hundred ninety-nine thousand, one hundred seventy-two".