3971776620 has 96 divisors (see below), whose sum is σ = 13262312448. Its totient is φ = 868361472.

The previous prime is 3971776619. The next prime is 3971776639. The reversal of 3971776620 is 266771793.

It is a self number, because there is not a number n which added to its sum of digits gives 3971776620.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 195919 + ... + 215238.

It is an arithmetic number, because the mean of its divisors is an integer number (138149088).

Almost surely, 2^3971776620 is an apocalyptic number.

3971776620 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3971776620 is an abundant number, since it is smaller than the sum of its proper divisors (9290535828).

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

3971776620 is a wasteful number, since it uses less digits than its factorization.

3971776620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 411199 (or 411197 counting only the distinct ones).

The product of its (nonzero) digits is 666792, while the sum is 48.

The square root of 3971776620 is about 63022.0328139294. The cubic root of 3971776620 is about 1583.6587511619.

The spelling of 3971776620 in words is "three billion, nine hundred seventy-one million, seven hundred seventy-six thousand, six hundred twenty".