725349988 has 54 divisors (see below), whose sum is σ = 1459065062. Its totient is φ = 315258240.

The previous prime is 725349979. The next prime is 725350009. The reversal of 725349988 is 889943527.

It can be written as a sum of positive squares in only one way, i.e., 589906944 + 135443044 = 24288^2 + 11638^2 .

It is a super-2 number, since 2×725349988² = 1052265210183200288, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 254620 + ... + 257452.

Almost surely, 2^725349988 is an apocalyptic number.

It is an amenable number.

725349988 is an abundant number, since it is smaller than the sum of its proper divisors (733715074).

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

725349988 is a wasteful number, since it uses less digits than its factorization.

725349988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2905 (or 2869 counting only the distinct ones).

The product of its digits is 4354560, while the sum is 55.

The square root of 725349988 is about 26932.3223655146. The cubic root of 725349988 is about 898.4954235722.

The spelling of 725349988 in words is "seven hundred twenty-five million, three hundred forty-nine thousand, nine hundred eighty-eight".