6408940 has 24 divisors (see below), whose sum is σ = 13894272. Its totient is φ = 2480640.

The previous prime is 6408931. The next prime is 6408953. The reversal of 6408940 is 498046.

It is a Harshad number since it is a multiple of its sum of digits (31).

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, 4549 + ... + 5788.

It is an arithmetic number, because the mean of its divisors is an integer number (578928).

Almost surely, 2^6408940 is an apocalyptic number.

It is an amenable number.

6408940 is an abundant number, since it is smaller than the sum of its proper divisors (7485332).

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

6408940 is a wasteful number, since it uses less digits than its factorization.

6408940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10377 (or 10375 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 6408940 is about 2531.5884341654. The cubic root of 6408940 is about 185.7499627147.

The spelling of 6408940 in words is "six million, four hundred eight thousand, nine hundred forty".