39725604 has 18 divisors (see below), whose sum is σ = 100417590. Its totient is φ = 13241856.

The previous prime is 39725591. The next prime is 39725611. The reversal of 39725604 is 40652793.

39725604 is a `hidden beast` number, since 3 + 97 + 2 + 560 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 24980004 + 14745600 = 4998^2 + 3840^2 .

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

It is a super-2 number, since 2×39725604² = 3156247226329632, which contains 22 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 1103489 = 39725604 / (3 + 9 + 7 + 2 + 5 + 6 + 0 + 4).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 551709 + ... + 551780.

It is an arithmetic number, because the mean of its divisors is an integer number (5578755).

Almost surely, 2^39725604 is an apocalyptic number.

It is an amenable number.

39725604 is an abundant number, since it is smaller than the sum of its proper divisors (60691986).

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

39725604 is a wasteful number, since it uses less digits than its factorization.

39725604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1103499 (or 1103494 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 36.

The square root of 39725604 is about 6302.8250808665. The cubic root of 39725604 is about 341.2113767018.

The spelling of 39725604 in words is "thirty-nine million, seven hundred twenty-five thousand, six hundred four".