408009399 has 16 divisors (see below), whose sum is σ = 625850880. Its totient is φ = 231602400.

The previous prime is 408009379. The next prime is 408009463. The reversal of 408009399 is 993900804.

It is not a de Polignac number, because 408009399 - 2⁷ = 408009271 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 408009399.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (408009319) 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, 61164 + ... + 67505.

It is an arithmetic number, because the mean of its divisors is an integer number (39115680).

Almost surely, 2^408009399 is an apocalyptic number.

408009399 is a deficient number, since it is larger than the sum of its proper divisors (217841481).

408009399 is a wasteful number, since it uses less digits than its factorization.

408009399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128830.

The product of its (nonzero) digits is 69984, while the sum is 42.

The square root of 408009399 is about 20199.2425353031. The cubic root of 408009399 is about 741.6916491578.

The spelling of 408009399 in words is "four hundred eight million, nine thousand, three hundred ninety-nine".