40520556 has 18 divisors (see below), whose sum is σ = 102427052. Its totient is φ = 13506840.

The previous prime is 40520507. The next prime is 40520561. The reversal of 40520556 is 65502504.

40520556 is a `hidden beast` number, since 405 + 205 + 56 = 666.

40520556 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (18).

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

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 5 ways as a sum of consecutive naturals, for example, 562750 + ... + 562821.

Almost surely, 2^40520556 is an apocalyptic number.

It is an amenable number.

40520556 is an abundant number, since it is smaller than the sum of its proper divisors (61906496).

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

40520556 is a wasteful number, since it uses less digits than its factorization.

40520556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1125581 (or 1125576 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 27.

The square root of 40520556 is about 6365.5758576895. The cubic root of 40520556 is about 343.4723635463.

The spelling of 40520556 in words is "forty million, five hundred twenty thousand, five hundred fifty-six".