40685757 has 8 divisors (see below), whose sum is σ = 61997376. Its totient is φ = 23248992.

The previous prime is 40685737. The next prime is 40685759. The reversal of 40685757 is 75758604.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 40685757 - 2⁷ = 40685629 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40685759) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 968688 + ... + 968729.

It is an arithmetic number, because the mean of its divisors is an integer number (7749672).

Almost surely, 2^40685757 is an apocalyptic number.

It is an amenable number.

40685757 is a deficient number, since it is larger than the sum of its proper divisors (21311619).

40685757 is a wasteful number, since it uses less digits than its factorization.

40685757 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1937427.

The product of its (nonzero) digits is 235200, while the sum is 42.

The square root of 40685757 is about 6378.5387825112. The cubic root of 40685757 is about 343.9385058863.

The spelling of 40685757 in words is "forty million, six hundred eighty-five thousand, seven hundred fifty-seven".