36640644 has 48 divisors (see below), whose sum is σ = 92651328. Its totient is φ = 11225088.

The previous prime is 36640631. The next prime is 36640651. The reversal of 36640644 is 44604663.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6684 + ... + 10860.

It is an arithmetic number, because the mean of its divisors is an integer number (1930236).

Almost surely, 2^36640644 is an apocalyptic number.

36640644 is a gapful number since it is divisible by the number (34) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 36640644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46325664).

36640644 is an abundant number, since it is smaller than the sum of its proper divisors (56010684).

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

36640644 is a wasteful number, since it uses less digits than its factorization.

36640644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4244 (or 4242 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 33.

The square root of 36640644 is about 6053.1515758322. The cubic root of 36640644 is about 332.1398863748.

The spelling of 36640644 in words is "thirty-six million, six hundred forty thousand, six hundred forty-four".