40556590 has 16 divisors (see below), whose sum is σ = 76176288. Its totient is φ = 15517216.

The previous prime is 40556557. The next prime is 40556591. The reversal of 40556590 is 9565504.

It is a happy number.

40556590 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40556591) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 87937 + ... + 88396.

It is an arithmetic number, because the mean of its divisors is an integer number (4761018).

Almost surely, 2^40556590 is an apocalyptic number.

40556590 is a deficient number, since it is larger than the sum of its proper divisors (35619698).

40556590 is a wasteful number, since it uses less digits than its factorization.

40556590 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176363.

The product of its (nonzero) digits is 27000, while the sum is 34.

The square root of 40556590 is about 6368.4056089417. The cubic root of 40556590 is about 343.5741474096.

The spelling of 40556590 in words is "forty million, five hundred fifty-six thousand, five hundred ninety".