40405156 has 24 divisors (see below), whose sum is σ = 77940576. Its totient is φ = 18174720.

The previous prime is 40405139. The next prime is 40405163. The reversal of 40405156 is 65150404.

It is a self number, because there is not a number n which added to its sum of digits gives 40405156.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 466 + ... + 9001.

It is an arithmetic number, because the mean of its divisors is an integer number (3247524).

Almost surely, 2^40405156 is an apocalyptic number.

It is an amenable number.

40405156 is a deficient number, since it is larger than the sum of its proper divisors (37535420).

40405156 is a wasteful number, since it uses less digits than its factorization.

40405156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9579 (or 9577 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 40405156 is about 6356.5050145501. The cubic root of 40405156 is about 343.1459909432.

The spelling of 40405156 in words is "forty million, four hundred five thousand, one hundred fifty-six".