3921263994 has 32 divisors (see below), whose sum is σ = 8012511360. Its totient is φ = 1279060992.

The previous prime is 3921263977. The next prime is 3921263999. The reversal of 3921263994 is 4993621293.

It is a super-2 number, since 2×3921263994² = 30752622621281664072, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (3921263999) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13947 + ... + 89649.

It is an arithmetic number, because the mean of its divisors is an integer number (250390980).

Almost surely, 2^3921263994 is an apocalyptic number.

3921263994 is an abundant number, since it is smaller than the sum of its proper divisors (4091247366).

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

3921263994 is a wasteful number, since it uses less digits than its factorization.

3921263994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75894.

The product of its digits is 629856, while the sum is 48.

The square root of 3921263994 is about 62619.9967582241. The cubic root of 3921263994 is about 1576.9164870951.

The spelling of 3921263994 in words is "three billion, nine hundred twenty-one million, two hundred sixty-three thousand, nine hundred ninety-four".