36409725 has 72 divisors (see below), whose sum is σ = 72888192. Its totient is φ = 17222400.

The previous prime is 36409721. The next prime is 36409771. The reversal of 36409725 is 52790463.

36409725 is a `hidden beast` number, since 3 + 640 + 9 + 7 + 2 + 5 = 666.

It is not a de Polignac number, because 36409725 - 2² = 36409721 is a prime.

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 self number, because there is not a number n which added to its sum of digits gives 36409725.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36409721) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 116169 + ... + 116481.

It is an arithmetic number, because the mean of its divisors is an integer number (1012336).

Almost surely, 2^36409725 is an apocalyptic number.

It is an amenable number.

36409725 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

36409725 is a wasteful number, since it uses less digits than its factorization.

36409725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 387 (or 379 counting only the distinct ones).

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

The square root of 36409725 is about 6034.0471493020. The cubic root of 36409725 is about 331.4406710502.

The spelling of 36409725 in words is "thirty-six million, four hundred nine thousand, seven hundred twenty-five".