40013859 has 16 divisors (see below), whose sum is σ = 56620800. Its totient is φ = 25081056.

The previous prime is 40013843. The next prime is 40013863. The reversal of 40013859 is 95831004.

It is not a de Polignac number, because 40013859 - 2⁴ = 40013843 is a prime.

It is a super-2 number, since 2×40013859² = 3202217824143762, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40013759) 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, 844 + ... + 8985.

It is an arithmetic number, because the mean of its divisors is an integer number (3538800).

Almost surely, 2^40013859 is an apocalyptic number.

40013859 is a deficient number, since it is larger than the sum of its proper divisors (16606941).

40013859 is a wasteful number, since it uses less digits than its factorization.

40013859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9914.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 40013859 is about 6325.6508756017. The cubic root of 40013859 is about 342.0346823690.

The spelling of 40013859 in words is "forty million, thirteen thousand, eight hundred fifty-nine".