3991404704 has 96 divisors (see below), whose sum is σ = 9665381376. Its totient is φ = 1583493120.

The previous prime is 3991404691. The next prime is 3991404713. The reversal of 3991404704 is 4074041993.

It is a super-2 number, since 2×3991404704² = 31862623022226655232, which contains 22 as substring.

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, 223697 + ... + 240879.

It is an arithmetic number, because the mean of its divisors is an integer number (100681056).

Almost surely, 2^3991404704 is an apocalyptic number.

3991404704 is a gapful number since it is divisible by the number (34) 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 3991404704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4832690688).

3991404704 is an abundant number, since it is smaller than the sum of its proper divisors (5673976672).

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

3991404704 is a wasteful number, since it uses less digits than its factorization.

3991404704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17278 (or 17270 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 41.

The square root of 3991404704 is about 63177.5648786814. The cubic root of 3991404704 is about 1586.2632214200.

The spelling of 3991404704 in words is "three billion, nine hundred ninety-one million, four hundred four thousand, seven hundred four".