408368916 has 18 divisors (see below), whose sum is σ = 1032265962. Its totient is φ = 136122960.

The previous prime is 408368903. The next prime is 408368927. The reversal of 408368916 is 619863804.

It can be written as a sum of positive squares in only one way, i.e., 382358916 + 26010000 = 19554^2 + 5100^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5671755 + ... + 5671826.

It is an arithmetic number, because the mean of its divisors is an integer number (57348109).

Almost surely, 2^408368916 is an apocalyptic number.

It is an amenable number.

408368916 is an abundant number, since it is smaller than the sum of its proper divisors (623897046).

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

408368916 is a wasteful number, since it uses less digits than its factorization.

408368916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11343591 (or 11343586 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 45.

The square root of 408368916 is about 20208.1398451218. The cubic root of 408368916 is about 741.9094321108.

The spelling of 408368916 in words is "four hundred eight million, three hundred sixty-eight thousand, nine hundred sixteen".