40656020 has 24 divisors (see below), whose sum is σ = 86583168. Its totient is φ = 16032800.

The previous prime is 40656013. The next prime is 40656023. The reversal of 40656020 is 2065604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40656023) 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, 12896 + ... + 15735.

It is an arithmetic number, because the mean of its divisors is an integer number (3607632).

Almost surely, 2^40656020 is an apocalyptic number.

It is an amenable number.

40656020 is an abundant number, since it is smaller than the sum of its proper divisors (45927148).

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

40656020 is a wasteful number, since it uses less digits than its factorization.

40656020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28711 (or 28709 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 40656020 is about 6376.2073366540. The cubic root of 40656020 is about 343.8546911978.

The spelling of 40656020 in words is "forty million, six hundred fifty-six thousand, twenty".