40213656 has 96 divisors (see below), whose sum is σ = 126291360. Its totient is φ = 11321856.

The previous prime is 40213651. The next prime is 40213681. The reversal of 40213656 is 65631204.

40213656 is a `hidden beast` number, since 4 + 0 + 2 + 1 + 3 + 656 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40213651) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36246 + ... + 37338.

It is an arithmetic number, because the mean of its divisors is an integer number (1315535).

Almost surely, 2^40213656 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 40213656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (63145680).

40213656 is an abundant number, since it is smaller than the sum of its proper divisors (86077704).

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

40213656 is a wasteful number, since it uses less digits than its factorization.

40213656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1185 (or 1178 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 40213656 is about 6341.4238148857. The cubic root of 40213656 is about 342.6030194300.

The spelling of 40213656 in words is "forty million, two hundred thirteen thousand, six hundred fifty-six".