408911616 has 108 divisors (see below), whose sum is σ = 1241178120. Its totient is φ = 129116160.

The previous prime is 408911603. The next prime is 408911627. The reversal of 408911616 is 616119804.

It is a happy number.

408911616 is a `hidden beast` number, since 408 + 91 + 161 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

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, 39106 + ... + 48446.

It is an arithmetic number, because the mean of its divisors is an integer number (11492390).

Almost surely, 2^408911616 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 408911616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (620589060).

408911616 is an abundant number, since it is smaller than the sum of its proper divisors (832266504).

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

408911616 is a wasteful number, since it uses less digits than its factorization.

408911616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9382 (or 9365 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 408911616 is about 20221.5631443269. The cubic root of 408911616 is about 742.2379390114.

The spelling of 408911616 in words is "four hundred eight million, nine hundred eleven thousand, six hundred sixteen".