725766388 has 12 divisors (see below), whose sum is σ = 1270279780. Its totient is φ = 362829312.

The previous prime is 725766373. The next prime is 725766401. The reversal of 725766388 is 883667527.

It can be written as a sum of positive squares in 2 ways, for example, as 192987664 + 532778724 = 13892^2 + 23082^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46420 + ... + 60052.

Almost surely, 2^725766388 is an apocalyptic number.

It is an amenable number.

725766388 is a deficient number, since it is larger than the sum of its proper divisors (544513392).

725766388 is a wasteful number, since it uses less digits than its factorization.

725766388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26946 (or 26944 counting only the distinct ones).

The product of its digits is 3386880, while the sum is 52.

The square root of 725766388 is about 26940.0517445680. The cubic root of 725766388 is about 898.6673230831.

The spelling of 725766388 in words is "seven hundred twenty-five million, seven hundred sixty-six thousand, three hundred eighty-eight".