40140656 has 20 divisors (see below), whose sum is σ = 78840192. Its totient is φ = 19794816.

The previous prime is 40140649. The next prime is 40140677. The reversal of 40140656 is 65604104.

It is a happy number.

It is a super-2 number, since 2×40140656² = 3222544528220672, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16016 + ... + 18351.

Almost surely, 2^40140656 is an apocalyptic number.

It is an amenable number.

40140656 is a deficient number, since it is larger than the sum of its proper divisors (38699536).

40140656 is a wasteful number, since it uses less digits than its factorization.

40140656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34448 (or 34442 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 40140656 is about 6335.6653952051. The cubic root of 40140656 is about 342.3955843464.

The spelling of 40140656 in words is "forty million, one hundred forty thousand, six hundred fifty-six".