725406136 has 48 divisors (see below), whose sum is σ = 1683234000. Its totient is φ = 286970112.

The previous prime is 725406109. The next prime is 725406137. The reversal of 725406136 is 631604527.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (725406137) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28861 + ... + 47788.

It is an arithmetic number, because the mean of its divisors is an integer number (35067375).

Almost surely, 2^725406136 is an apocalyptic number.

It is an amenable number.

725406136 is an abundant number, since it is smaller than the sum of its proper divisors (957827864).

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

725406136 is a wasteful number, since it uses less digits than its factorization.

725406136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76688 (or 76671 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 34.

The square root of 725406136 is about 26933.3647359553. The cubic root of 725406136 is about 898.5186065966.

The spelling of 725406136 in words is "seven hundred twenty-five million, four hundred six thousand, one hundred thirty-six".