999608408 has 64 divisors (see below), whose sum is σ = 1973237760. Its totient is φ = 474304896.

The previous prime is 999608399. The next prime is 999608417. The reversal of 999608408 is 804806999.

It is an interprime number because it is at equal distance from previous prime (999608399) and next prime (999608417).

It is a Harshad number since it is a multiple of its sum of digits (53).

It is a self number, because there is not a number n which added to its sum of digits gives 999608408.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2052341 + ... + 2052827.

It is an arithmetic number, because the mean of its divisors is an integer number (30831840).

Almost surely, 2^999608408 is an apocalyptic number.

It is an amenable number.

999608408 is a deficient number, since it is larger than the sum of its proper divisors (973629352).

999608408 is a wasteful number, since it uses less digits than its factorization.

999608408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 696 (or 692 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 53.

The square root of 999608408 is about 31616.5843822510. The cubic root of 999608408 is about 999.8694522914.

The spelling of 999608408 in words is "nine hundred ninety-nine million, six hundred eight thousand, four hundred eight".