40186864 has 20 divisors (see below), whose sum is σ = 78479104. Its totient is φ = 19934208.

The previous prime is 40186841. The next prime is 40186873. The reversal of 40186864 is 46868104.

40186864 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×40186864² = 3229968076308992, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7857 + ... + 11920.

Almost surely, 2^40186864 is an apocalyptic number.

It is an amenable number.

40186864 is a deficient number, since it is larger than the sum of its proper divisors (38292240).

40186864 is a wasteful number, since it uses less digits than its factorization.

40186864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19912 (or 19906 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 37.

The square root of 40186864 is about 6339.3110035713. The cubic root of 40186864 is about 342.5269170953.

The spelling of 40186864 in words is "forty million, one hundred eighty-six thousand, eight hundred sixty-four".