36921680 has 20 divisors (see below), whose sum is σ = 85843092. Its totient is φ = 14768640.

The previous prime is 36921673. The next prime is 36921683. The reversal of 36921680 is 8612963.

It can be written as a sum of positive squares in 2 ways, for example, as 21492496 + 15429184 = 4636^2 + 3928^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a self number, because there is not a number n which added to its sum of digits gives 36921680.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36921683) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 230681 + ... + 230840.

Almost surely, 2^36921680 is an apocalyptic number.

It is an amenable number.

36921680 is an abundant number, since it is smaller than the sum of its proper divisors (48921412).

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

36921680 is a wasteful number, since it uses less digits than its factorization.

36921680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 461534 (or 461528 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 36921680 is about 6076.3212554966. The cubic root of 36921680 is about 332.9869023036.

The spelling of 36921680 in words is "thirty-six million, nine hundred twenty-one thousand, six hundred eighty".