40245656 has 32 divisors (see below), whose sum is σ = 83883600. Its totient is φ = 17946240.

The previous prime is 40245637. The next prime is 40245659. The reversal of 40245656 is 65654204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40245659) 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, 350 + ... + 8978.

Almost surely, 2^40245656 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40245656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41941800).

40245656 is an abundant number, since it is smaller than the sum of its proper divisors (43637944).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40245656 is a wasteful number, since it uses less digits than its factorization.

40245656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8699 (or 8695 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 32.

The square root of 40245656 is about 6343.9464058266. The cubic root of 40245656 is about 342.6938707393.

The spelling of 40245656 in words is "forty million, two hundred forty-five thousand, six hundred fifty-six".