40185807 has 16 divisors (see below), whose sum is σ = 59201280. Its totient is φ = 24117632.

The previous prime is 40185797. The next prime is 40185809. The reversal of 40185807 is 70858104.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 40185807 - 2⁴ = 40185791 is a prime.

It is a super-2 number, since 2×40185807² = 3229798168482498, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40185809) 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, 15957 + ... + 18302.

It is an arithmetic number, because the mean of its divisors is an integer number (3700080).

Almost surely, 2^40185807 is an apocalyptic number.

40185807 is a deficient number, since it is larger than the sum of its proper divisors (19015473).

40185807 is a wasteful number, since it uses less digits than its factorization.

40185807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34302.

The product of its (nonzero) digits is 8960, while the sum is 33.

The square root of 40185807 is about 6339.2276343416. The cubic root of 40185807 is about 342.5239140068.

The spelling of 40185807 in words is "forty million, one hundred eighty-five thousand, eight hundred seven".