725663808 has 168 divisors, whose sum is σ = 2227397120. Its totient is φ = 225192960.

The previous prime is 725663803. The next prime is 725663831. The reversal of 725663808 is 808366527.

725663808 is a `hidden beast` number, since 7 + 2 + 5 + 6 + 638 + 0 + 8 = 666.

725663808 is nontrivially palindromic in base 7.

It is not an unprimeable number, because it can be changed into a prime (725663803) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 667041 + ... + 668127.

Almost surely, 2^725663808 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 725663808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1113698560).

725663808 is an abundant number, since it is smaller than the sum of its proper divisors (1501733312).

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

725663808 is a wasteful number, since it uses less digits than its factorization.

725663808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1185 (or 1172 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 45.

The square root of 725663808 is about 26938.1478205165. The cubic root of 725663808 is about 898.6249818013.

The spelling of 725663808 in words is "seven hundred twenty-five million, six hundred sixty-three thousand, eight hundred eight".