3991277376 has 112 divisors (see below), whose sum is σ = 11751868800. Its totient is φ = 1328357376.

The previous prime is 3991277369. The next prime is 3991277399. The reversal of 3991277376 is 6737721993.

It is a happy number.

3991277376 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

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, 1448416 + ... + 1451168.

It is an arithmetic number, because the mean of its divisors is an integer number (104927400).

Almost surely, 2^3991277376 is an apocalyptic number.

3991277376 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 3991277376, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5875934400).

3991277376 is an abundant number, since it is smaller than the sum of its proper divisors (7760591424).

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

3991277376 is a wasteful number, since it uses less digits than its factorization.

3991277376 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3613 (or 3597 counting only the distinct ones).

The product of its digits is 3000564, while the sum is 54.

The square root of 3991277376 is about 63176.5571711533. The cubic root of 3991277376 is about 1586.2463536850.

The spelling of 3991277376 in words is "three billion, nine hundred ninety-one million, two hundred seventy-seven thousand, three hundred seventy-six".