40318899 has 4 divisors (see below), whose sum is σ = 53758536. Its totient is φ = 26879264.

The previous prime is 40318891. The next prime is 40318909. The reversal of 40318899 is 99881304.

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

It is a cyclic number.

It is not a de Polignac number, because 40318899 - 2³ = 40318891 is a prime.

It is a super-2 number, since 2×40318899² = 3251227233144402, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 40318899.

It is not an unprimeable number, because it can be changed into a prime (40318891) 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, 6719814 + ... + 6719819.

It is an arithmetic number, because the mean of its divisors is an integer number (13439634).

Almost surely, 2^40318899 is an apocalyptic number.

40318899 is a deficient number, since it is larger than the sum of its proper divisors (13439637).

40318899 is a wasteful number, since it uses less digits than its factorization.

40318899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13439636.

The product of its (nonzero) digits is 62208, while the sum is 42.

The square root of 40318899 is about 6349.7164503622. The cubic root of 40318899 is about 342.9016340824.

The spelling of 40318899 in words is "forty million, three hundred eighteen thousand, eight hundred ninety-nine".