3644806920 has 64 divisors (see below), whose sum is σ = 10951657920. Its totient is φ = 970416384.

The previous prime is 3644806811. The next prime is 3644806931. The reversal of 3644806920 is 296084463.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53542 + ... + 100778.

It is an arithmetic number, because the mean of its divisors is an integer number (171119655).

Almost surely, 2^3644806920 is an apocalyptic number.

3644806920 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3644806920 is an abundant number, since it is smaller than the sum of its proper divisors (7306851000).

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

3644806920 is a wasteful number, since it uses less digits than its factorization.

3644806920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47894 (or 47890 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 42.

The square root of 3644806920 is about 60372.2363342621. The cubic root of 3644806920 is about 1538.9511776892.

The spelling of 3644806920 in words is "three billion, six hundred forty-four million, eight hundred six thousand, nine hundred twenty".