654643808 has 72 divisors (see below), whose sum is σ = 1595060208. Its totient is φ = 258964992.

The previous prime is 654643793. The next prime is 654643813. The reversal of 654643808 is 808346456.

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, 29210 + ... + 46502.

It is an arithmetic number, because the mean of its divisors is an integer number (22153614).

Almost surely, 2^654643808 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 654643808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (797530104).

654643808 is an abundant number, since it is smaller than the sum of its proper divisors (940416400).

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

654643808 is a wasteful number, since it uses less digits than its factorization.

654643808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17336 (or 17315 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 44.

The square root of 654643808 is about 25586.0080512768. The cubic root of 654643808 is about 868.2971085381.

The spelling of 654643808 in words is "six hundred fifty-four million, six hundred forty-three thousand, eight hundred eight".