40408899 has 8 divisors (see below), whose sum is σ = 53921472. Its totient is φ = 26917800.

The previous prime is 40408889. The next prime is 40408933. The reversal of 40408899 is 99880404.

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

It is not a de Polignac number, because 40408899 - 2⁴ = 40408883 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40408899.

It is not an unprimeable number, because it can be changed into a prime (40408889) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 289 + ... + 8994.

It is an arithmetic number, because the mean of its divisors is an integer number (6740184).

Almost surely, 2^40408899 is an apocalyptic number.

40408899 is a deficient number, since it is larger than the sum of its proper divisors (13512573).

40408899 is a wasteful number, since it uses less digits than its factorization.

40408899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10737.

The product of its (nonzero) digits is 82944, while the sum is 42.

The square root of 40408899 is about 6356.7994305311. The cubic root of 40408899 is about 343.1565865859.

The spelling of 40408899 in words is "forty million, four hundred eight thousand, eight hundred ninety-nine".