3921782920 has 32 divisors (see below), whose sum is σ = 9626195520. Its totient is φ = 1426102720.

The previous prime is 3921782857. The next prime is 3921782927. The reversal of 3921782920 is 292871293.

It is not an unprimeable number, because it can be changed into a prime (3921782927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4456132 + ... + 4457011.

It is an arithmetic number, because the mean of its divisors is an integer number (300818610).

Almost surely, 2^3921782920 is an apocalyptic number.

It is an amenable number.

3921782920 is an abundant number, since it is smaller than the sum of its proper divisors (5704412600).

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

3921782920 is a wasteful number, since it uses less digits than its factorization.

3921782920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8913165 (or 8913161 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 43.

The square root of 3921782920 is about 62624.1400739363. The cubic root of 3921782920 is about 1576.9860451825.

The spelling of 3921782920 in words is "three billion, nine hundred twenty-one million, seven hundred eighty-two thousand, nine hundred twenty".