3891686976 has 42 divisors (see below), whose sum is σ = 11154819702. Its totient is φ = 1297228800.

The previous prime is 3891686969. The next prime is 3891686983. The reversal of 3891686976 is 6796861983.

3891686976 is a `hidden beast` number, since 389 + 168 + 6 + 97 + 6 = 666.

It is an interprime number because it is at equal distance from previous prime (3891686969) and next prime (3891686983).

It can be written as a sum of positive squares in only one way, i.e., 3890765376 + 921600 = 62376^2 + 960^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3377625 + ... + 3378776.

Almost surely, 2^3891686976 is an apocalyptic number.

3891686976 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

3891686976 is an abundant number, since it is smaller than the sum of its proper divisors (7263132726).

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

3891686976 is a wasteful number, since it uses less digits than its factorization.

3891686976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6756419 (or 6756406 counting only the distinct ones).

The product of its digits is 23514624, while the sum is 63.

The square root of 3891686976 is about 62383.3870193019. The cubic root of 3891686976 is about 1572.9417273634.

The spelling of 3891686976 in words is "three billion, eight hundred ninety-one million, six hundred eighty-six thousand, nine hundred seventy-six".