40099566 has 32 divisors (see below), whose sum is σ = 91451808. Its totient is φ = 11612160.

The previous prime is 40099513. The next prime is 40099571. The reversal of 40099566 is 66599004.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13795 + ... + 16446.

It is an arithmetic number, because the mean of its divisors is an integer number (2857869).

Almost surely, 2^40099566 is an apocalyptic number.

40099566 is an abundant number, since it is smaller than the sum of its proper divisors (51352242).

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

40099566 is a wasteful number, since it uses less digits than its factorization.

40099566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30276.

The product of its (nonzero) digits is 58320, while the sum is 39.

The square root of 40099566 is about 6332.4218115978. The cubic root of 40099566 is about 342.2787133292.

The spelling of 40099566 in words is "forty million, ninety-nine thousand, five hundred sixty-six".