725707388 has 48 divisors (see below), whose sum is σ = 1489635840. Its totient is φ = 302871744.

The previous prime is 725707387. The next prime is 725707453. The reversal of 725707388 is 883707527.

It is a happy number.

725707388 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-4 number, since 4×725707388⁴ (a number of 37 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (725707387) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 527870 + ... + 529242.

It is an arithmetic number, because the mean of its divisors is an integer number (31034080).

Almost surely, 2^725707388 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 725707388, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (744817920).

725707388 is an abundant number, since it is smaller than the sum of its proper divisors (763928452).

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

725707388 is a wasteful number, since it uses less digits than its factorization.

725707388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1866 (or 1864 counting only the distinct ones).

The product of its (nonzero) digits is 658560, while the sum is 47.

The square root of 725707388 is about 26938.9566984321. The cubic root of 725707388 is about 898.6429705229.

The spelling of 725707388 in words is "seven hundred twenty-five million, seven hundred seven thousand, three hundred eighty-eight".