36638864 has 10 divisors (see below), whose sum is σ = 70987830. Its totient is φ = 18319424.

The previous prime is 36638863. The next prime is 36638873. The reversal of 36638864 is 46883663.

It can be written as a sum of positive squares in only one way, i.e., 32262400 + 4376464 = 5680^2 + 2092^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36638863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1144949 + ... + 1144980.

It is an arithmetic number, because the mean of its divisors is an integer number (7098783).

Almost surely, 2^36638864 is an apocalyptic number.

It is an amenable number.

36638864 is a deficient number, since it is larger than the sum of its proper divisors (34348966).

36638864 is a wasteful number, since it uses less digits than its factorization.

36638864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2289937 (or 2289931 counting only the distinct ones).

The product of its digits is 497664, while the sum is 44.

The square root of 36638864 is about 6053.0045432000. The cubic root of 36638864 is about 332.1345078433.

The spelling of 36638864 in words is "thirty-six million, six hundred thirty-eight thousand, eight hundred sixty-four".