3991914990 has 48 divisors (see below), whose sum is σ = 11861692128. Its totient is φ = 912437568.

The previous prime is 3991914977. The next prime is 3991915001. The reversal of 3991914990 is 994191993.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3167557 + ... + 3168816.

It is an arithmetic number, because the mean of its divisors is an integer number (247118586).

Almost surely, 2^3991914990 is an apocalyptic number.

3991914990 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

3991914990 is an abundant number, since it is smaller than the sum of its proper divisors (7869777138).

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

3991914990 is a wasteful number, since it uses less digits than its factorization.

3991914990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6336393 (or 6336390 counting only the distinct ones).

The product of its (nonzero) digits is 708588, while the sum is 54.

The square root of 3991914990 is about 63181.6032560112. The cubic root of 3991914990 is about 1586.3308177912.

The spelling of 3991914990 in words is "three billion, nine hundred ninety-one million, nine hundred fourteen thousand, nine hundred ninety".