408981996 has 36 divisors (see below), whose sum is σ = 1040172952. Its totient is φ = 135489024.

The previous prime is 408981961. The next prime is 408982033. The reversal of 408981996 is 699189804.

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28981 + ... + 40716.

Almost surely, 2^408981996 is an apocalyptic number.

It is an amenable number.

408981996 is an abundant number, since it is smaller than the sum of its proper divisors (631190956).

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

408981996 is a wasteful number, since it uses less digits than its factorization.

408981996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69870 (or 69865 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 54.

The square root of 408981996 is about 20223.3032910057. The cubic root of 408981996 is about 742.2805201034.

The spelling of 408981996 in words is "four hundred eight million, nine hundred eighty-one thousand, nine hundred ninety-six".