40556985 has 32 divisors (see below), whose sum is σ = 78527232. Its totient is φ = 17448960.

The previous prime is 40556983. The next prime is 40556987. The reversal of 40556985 is 58965504.

It is an interprime number because it is at equal distance from previous prime (40556983) and next prime (40556987).

It is not a de Polignac number, because 40556985 - 2¹ = 40556983 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40556983) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9576 + ... + 13145.

It is an arithmetic number, because the mean of its divisors is an integer number (2453976).

Almost surely, 2^40556985 is an apocalyptic number.

It is an amenable number.

40556985 is a deficient number, since it is larger than the sum of its proper divisors (37970247).

40556985 is a wasteful number, since it uses less digits than its factorization.

40556985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22753.

The product of its (nonzero) digits is 216000, while the sum is 42.

The square root of 40556985 is about 6368.4366213381. The cubic root of 40556985 is about 343.5752628169.

The spelling of 40556985 in words is "forty million, five hundred fifty-six thousand, nine hundred eighty-five".