3921669420 has 48 divisors (see below), whose sum is σ = 11359323360. Its totient is φ = 1009716736.

The previous prime is 3921669397. The next prime is 3921669469. The reversal of 3921669420 is 249661293.

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, 1125177 + ... + 1128656.

It is an arithmetic number, because the mean of its divisors is an integer number (236652570).

Almost surely, 2^3921669420 is an apocalyptic number.

3921669420 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3921669420 is an abundant number, since it is smaller than the sum of its proper divisors (7437653940).

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

3921669420 is a wasteful number, since it uses less digits than its factorization.

3921669420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2253874 (or 2253872 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 42.

The square root of 3921669420 is about 62623.2338673116. The cubic root of 3921669420 is about 1576.9708318941.

The spelling of 3921669420 in words is "three billion, nine hundred twenty-one million, six hundred sixty-nine thousand, four hundred twenty".