3991469976 has 192 divisors, whose sum is σ = 12110192640. Its totient is φ = 1179360000.

The previous prime is 3991469941. The next prime is 3991470031. The reversal of 3991469976 is 6799641993.

It is a super-3 number, since 3×3991469976³ (a number of 30 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4380961 + ... + 4381871.

It is an arithmetic number, because the mean of its divisors is an integer number (63073920).

Almost surely, 2^3991469976 is an apocalyptic number.

3991469976 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3991469976, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6055096320).

3991469976 is an abundant number, since it is smaller than the sum of its proper divisors (8118722664).

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

3991469976 is a wasteful number, since it uses less digits than its factorization.

3991469976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1118 (or 1111 counting only the distinct ones).

The product of its digits is 19840464, while the sum is 63.

The square root of 3991469976 is about 63178.0814523518. The cubic root of 3991469976 is about 1586.2718681678.

The spelling of 3991469976 in words is "three billion, nine hundred ninety-one million, four hundred sixty-nine thousand, nine hundred seventy-six".