4091997888 has 84 divisors (see below), whose sum is σ = 12795263208. Its totient is φ = 1239997440.

The previous prime is 4091997853. The next prime is 4091997893. The reversal of 4091997888 is 8887991904.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 316581 + ... + 329252.

It is an arithmetic number, because the mean of its divisors is an integer number (152324562).

Almost surely, 2^4091997888 is an apocalyptic number.

4091997888 is a gapful number since it is divisible by the number (48) formed by its first and last digit.

It is an amenable number.

4091997888 is an abundant number, since it is smaller than the sum of its proper divisors (8703265320).

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

4091997888 is a wasteful number, since it uses less digits than its factorization.

4091997888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 645862 (or 645849 counting only the distinct ones).

The product of its (nonzero) digits is 10450944, while the sum is 63.

The square root of 4091997888 is about 63968.7258588132. The cubic root of 4091997888 is about 1599.4787218533.

The spelling of 4091997888 in words is "four billion, ninety-one million, nine hundred ninety-seven thousand, eight hundred eighty-eight".