40393756 has 24 divisors (see below), whose sum is σ = 76310640. Its totient is φ = 18598272.

The previous prime is 40393741. The next prime is 40393757. The reversal of 40393756 is 65739304.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40393757) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 31455 + ... + 32713.

It is an arithmetic number, because the mean of its divisors is an integer number (3179610).

Almost surely, 2^40393756 is an apocalyptic number.

It is an amenable number.

40393756 is a deficient number, since it is larger than the sum of its proper divisors (35916884).

40393756 is a wasteful number, since it uses less digits than its factorization.

40393756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1893 (or 1891 counting only the distinct ones).

The product of its (nonzero) digits is 68040, while the sum is 37.

The square root of 40393756 is about 6355.6082321049. The cubic root of 40393756 is about 343.1137159183.

The spelling of 40393756 in words is "forty million, three hundred ninety-three thousand, seven hundred fifty-six".