40013806 has 8 divisors (see below), whose sum is σ = 68595120. Its totient is φ = 17148768.

The previous prime is 40013803. The next prime is 40013843. The reversal of 40013806 is 60831004.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×40013806² = 3202209341211272, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40013803) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1429051 + ... + 1429078.

It is an arithmetic number, because the mean of its divisors is an integer number (8574390).

Almost surely, 2^40013806 is an apocalyptic number.

40013806 is a deficient number, since it is larger than the sum of its proper divisors (28581314).

40013806 is a wasteful number, since it uses less digits than its factorization.

40013806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2858138.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 40013806 is about 6325.6466863080. The cubic root of 40013806 is about 342.0345313559.

The spelling of 40013806 in words is "forty million, thirteen thousand, eight hundred six".