40569388 has 12 divisors (see below), whose sum is σ = 71556352. Its totient is φ = 20124720.

The previous prime is 40569379. The next prime is 40569391. The reversal of 40569388 is 88396504.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39423 + ... + 40438.

Almost surely, 2^40569388 is an apocalyptic number.

It is an amenable number.

40569388 is a deficient number, since it is larger than the sum of its proper divisors (30986964).

40569388 is a wasteful number, since it uses less digits than its factorization.

40569388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79992 (or 79990 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 43.

The square root of 40569388 is about 6369.4103337750. The cubic root of 40569388 is about 343.6102829222.

The spelling of 40569388 in words is "forty million, five hundred sixty-nine thousand, three hundred eighty-eight".