40170685 has 4 divisors (see below), whose sum is σ = 48204828. Its totient is φ = 32136544.

The previous prime is 40170667. The next prime is 40170701. The reversal of 40170685 is 58607104.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 14333796 + 25836889 = 3786^2 + 5083^2 .

It is a cyclic number.

It is not a de Polignac number, because 40170685 - 2¹⁵ = 40137917 is a prime.

It is a super-2 number, since 2×40170685² = 3227367866738450, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4017064 + ... + 4017073.

It is an arithmetic number, because the mean of its divisors is an integer number (12051207).

Almost surely, 2^40170685 is an apocalyptic number.

It is an amenable number.

40170685 is a deficient number, since it is larger than the sum of its proper divisors (8034143).

40170685 is an equidigital number, since it uses as much as digits as its factorization.

40170685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8034142.

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 40170685 is about 6338.0347900591. The cubic root of 40170685 is about 342.4809444706.

Adding to 40170685 its reverse (58607104), we get a palindrome (98777789).

The spelling of 40170685 in words is "forty million, one hundred seventy thousand, six hundred eighty-five".