408879940 has 24 divisors (see below), whose sum is σ = 981312192. Its totient is φ = 140187360.

The previous prime is 408879923. The next prime is 408879941. The reversal of 408879940 is 49978804.

It is not an unprimeable number, because it can be changed into a prime (408879941) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1460146 + ... + 1460425.

It is an arithmetic number, because the mean of its divisors is an integer number (40888008).

Almost surely, 2^408879940 is an apocalyptic number.

It is an amenable number.

408879940 is an abundant number, since it is smaller than the sum of its proper divisors (572432252).

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

408879940 is a wasteful number, since it uses less digits than its factorization.

408879940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2920587 (or 2920585 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 49.

The square root of 408879940 is about 20220.7799058295. The cubic root of 408879940 is about 742.2187729005.

The spelling of 408879940 in words is "four hundred eight million, eight hundred seventy-nine thousand, nine hundred forty".