725749736 has 8 divisors (see below), whose sum is σ = 1360780770. Its totient is φ = 362874864.

The previous prime is 725749729. The next prime is 725749747. The reversal of 725749736 is 637947527.

It can be written as a sum of positive squares in only one way, i.e., 694322500 + 31427236 = 26350^2 + 5606^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45359351 + ... + 45359366.

Almost surely, 2^725749736 is an apocalyptic number.

It is an amenable number.

725749736 is a deficient number, since it is larger than the sum of its proper divisors (635031034).

725749736 is a wasteful number, since it uses less digits than its factorization.

725749736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90718723 (or 90718719 counting only the distinct ones).

The product of its digits is 2222640, while the sum is 50.

The square root of 725749736 is about 26939.7426862248. The cubic root of 725749736 is about 898.6604500162.

The spelling of 725749736 in words is "seven hundred twenty-five million, seven hundred forty-nine thousand, seven hundred thirty-six".