40491868 has 24 divisors (see below), whose sum is σ = 74995200. Its totient is φ = 19089840.

The previous prime is 40491833. The next prime is 40491881. The reversal of 40491868 is 86819404.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 40491868.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3433 + ... + 9631.

It is an arithmetic number, because the mean of its divisors is an integer number (3124800).

Almost surely, 2^40491868 is an apocalyptic number.

It is an amenable number.

40491868 is a deficient number, since it is larger than the sum of its proper divisors (34503332).

40491868 is a wasteful number, since it uses less digits than its factorization.

40491868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6297 (or 6295 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 40.

The square root of 40491868 is about 6363.3220883435. The cubic root of 40491868 is about 343.3912864961.

The spelling of 40491868 in words is "forty million, four hundred ninety-one thousand, eight hundred sixty-eight".