3991877316 has 180 divisors, whose sum is σ = 12532455936. Its totient is φ = 1103608800.

The previous prime is 3991877311. The next prime is 3991877339. The reversal of 3991877316 is 6137781993.

3991877316 is a `hidden beast` number, since 399 + 187 + 73 + 1 + 6 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (3991877311) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 488101 + ... + 496211.

Almost surely, 2^3991877316 is an apocalyptic number.

3991877316 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 3991877316, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6266227968).

3991877316 is an abundant number, since it is smaller than the sum of its proper divisors (8540578620).

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

3991877316 is a wasteful number, since it uses less digits than its factorization.

3991877316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8172 (or 8154 counting only the distinct ones).

The product of its digits is 1714608, while the sum is 54.

The square root of 3991877316 is about 63181.3051147252. The cubic root of 3991877316 is about 1586.3258274031.

The spelling of 3991877316 in words is "three billion, nine hundred ninety-one million, eight hundred seventy-seven thousand, three hundred sixteen".