725885440 has 80 divisors (see below), whose sum is σ = 1989104832. Its totient is φ = 248868864.

The previous prime is 725885423. The next prime is 725885453. The reversal of 725885440 is 44588527.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2334 + ... + 38173.

Almost surely, 2^725885440 is an apocalyptic number.

725885440 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 725885440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (994552416).

725885440 is an abundant number, since it is smaller than the sum of its proper divisors (1263219392).

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

725885440 is an equidigital number, since it uses as much as digits as its factorization.

725885440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40537 (or 40521 counting only the distinct ones).

The product of its (nonzero) digits is 358400, while the sum is 43.

The square root of 725885440 is about 26942.2612265563. The cubic root of 725885440 is about 898.7164584038.

The spelling of 725885440 in words is "seven hundred twenty-five million, eight hundred eighty-five thousand, four hundred forty".