36904581 has 24 divisors (see below), whose sum is σ = 63573120. Its totient is φ = 20170656.

The previous prime is 36904561. The next prime is 36904583. The reversal of 36904581 is 18540963.

It is not a de Polignac number, because 36904581 - 2⁷ = 36904453 is a prime.

It is a super-2 number, since 2×36904581² = 2723896197571122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36904583) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11286 + ... + 14183.

It is an arithmetic number, because the mean of its divisors is an integer number (2648880).

Almost surely, 2^36904581 is an apocalyptic number.

It is an amenable number.

36904581 is a deficient number, since it is larger than the sum of its proper divisors (26668539).

36904581 is a wasteful number, since it uses less digits than its factorization.

36904581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25505 (or 25502 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 36904581 is about 6074.9140734664. The cubic root of 36904581 is about 332.9354905746.

The spelling of 36904581 in words is "thirty-six million, nine hundred four thousand, five hundred eighty-one".