36921640 has 64 divisors (see below), whose sum is σ = 98236800. Its totient is φ = 12219648.

The previous prime is 36921613. The next prime is 36921641. The reversal of 36921640 is 4612963.

It is not an unprimeable number, because it can be changed into a prime (36921641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5847 + ... + 10393.

It is an arithmetic number, because the mean of its divisors is an integer number (1534950).

Almost surely, 2^36921640 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 36921640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49118400).

36921640 is an abundant number, since it is smaller than the sum of its proper divisors (61315160).

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

36921640 is a wasteful number, since it uses less digits than its factorization.

36921640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4594 (or 4590 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 36921640 is about 6076.3179640305. The cubic root of 36921640 is about 332.9867820537.

The spelling of 36921640 in words is "thirty-six million, nine hundred twenty-one thousand, six hundred forty".