36800721 has 12 divisors (see below), whose sum is σ = 53411280. Its totient is φ = 24416280.

The previous prime is 36800717. The next prime is 36800749. The reversal of 36800721 is 12700863.

It is not a de Polignac number, because 36800721 - 2² = 36800717 is a prime.

It is a super-2 number, since 2×36800721² = 2708586132239682, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (36800711) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7791 + ... + 11588.

It is an arithmetic number, because the mean of its divisors is an integer number (4450940).

Almost surely, 2^36800721 is an apocalyptic number.

It is an amenable number.

36800721 is a deficient number, since it is larger than the sum of its proper divisors (16610559).

36800721 is a wasteful number, since it uses less digits than its factorization.

36800721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19596 (or 19593 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 36800721 is about 6066.3597816153. The cubic root of 36800721 is about 332.6228720323.

The spelling of 36800721 in words is "thirty-six million, eight hundred thousand, seven hundred twenty-one".