725186988 has 18 divisors (see below), whose sum is σ = 1833111644. Its totient is φ = 241728984.

The previous prime is 725186983. The next prime is 725186989. The reversal of 725186988 is 889681527.

It is a tau number, because it is divible by the number of its divisors (18).

It is not an unprimeable number, because it can be changed into a prime (725186981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10072006 + ... + 10072077.

Almost surely, 2^725186988 is an apocalyptic number.

It is an amenable number.

725186988 is an abundant number, since it is smaller than the sum of its proper divisors (1107924656).

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

725186988 is a wasteful number, since it uses less digits than its factorization.

725186988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20144093 (or 20144088 counting only the distinct ones).

The product of its digits is 1935360, while the sum is 54.

The square root of 725186988 is about 26929.2960918031. The cubic root of 725186988 is about 898.4281155010.

The spelling of 725186988 in words is "seven hundred twenty-five million, one hundred eighty-six thousand, nine hundred eighty-eight".