40856720 has 20 divisors (see below), whose sum is σ = 94992060. Its totient is φ = 16342656.

The previous prime is 40856719. The next prime is 40856731. The reversal of 40856720 is 2765804.

40856720 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 16096144 + 24760576 = 4012^2 + 4976^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 255275 + ... + 255434.

It is an arithmetic number, because the mean of its divisors is an integer number (4749603).

Almost surely, 2^40856720 is an apocalyptic number.

40856720 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40856720 is an abundant number, since it is smaller than the sum of its proper divisors (54135340).

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

40856720 is a wasteful number, since it uses less digits than its factorization.

40856720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 510722 (or 510716 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 32.

The square root of 40856720 is about 6391.9261572706. The cubic root of 40856720 is about 344.4195799680.

The spelling of 40856720 in words is "forty million, eight hundred fifty-six thousand, seven hundred twenty".