40299985 has 16 divisors (see below), whose sum is σ = 52879680. Its totient is φ = 29240640.

The previous prime is 40299977. The next prime is 40299989. The reversal of 40299985 is 58999204.

It is not a de Polignac number, because 40299985 - 2³ = 40299977 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40299989) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46486 + ... + 47344.

It is an arithmetic number, because the mean of its divisors is an integer number (3304980).

Almost surely, 2^40299985 is an apocalyptic number.

It is an amenable number.

40299985 is a deficient number, since it is larger than the sum of its proper divisors (12579695).

40299985 is a wasteful number, since it uses less digits than its factorization.

40299985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1728.

The product of its (nonzero) digits is 233280, while the sum is 46.

The square root of 40299985 is about 6348.2269178094. The cubic root of 40299985 is about 342.8480061636.

The spelling of 40299985 in words is "forty million, two hundred ninety-nine thousand, nine hundred eighty-five".