408639012 has 24 divisors (see below), whose sum is σ = 954110976. Its totient is φ = 136124448.

The previous prime is 408638969. The next prime is 408639037. The reversal of 408639012 is 210936804.

It is a super-2 number, since 2×408639012² = 333971684256672288, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9718 + ... + 30194.

It is an arithmetic number, because the mean of its divisors is an integer number (39754624).

Almost surely, 2^408639012 is an apocalyptic number.

It is an amenable number.

408639012 is an abundant number, since it is smaller than the sum of its proper divisors (545471964).

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

408639012 is a wasteful number, since it uses less digits than its factorization.

408639012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22147 (or 22145 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 408639012 is about 20214.8215920893. The cubic root of 408639012 is about 742.0729628462.

The spelling of 408639012 in words is "four hundred eight million, six hundred thirty-nine thousand, twelve".