725699520 has 672 divisors, whose sum is σ = 3212835840. Its totient is φ = 150958080.

The previous prime is 725699501. The next prime is 725699531. The reversal of 725699520 is 25996527.

725699520 is a `hidden beast` number, since 72 + 56 + 9 + 9 + 520 = 666.

It is a tau number, because it is divible by the number of its divisors (672).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 10221085 + ... + 10221155.

Almost surely, 2^725699520 is an apocalyptic number.

725699520 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 725699520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1606417920).

725699520 is an abundant number, since it is smaller than the sum of its proper divisors (2487136320).

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

725699520 is a wasteful number, since it uses less digits than its factorization.

725699520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130 (or 101 counting only the distinct ones).

The product of its (nonzero) digits is 340200, while the sum is 45.

The square root of 725699520 is about 26938.8106641700. The cubic root of 725699520 is about 898.6397228648.

The spelling of 725699520 in words is "seven hundred twenty-five million, six hundred ninety-nine thousand, five hundred twenty".