18828399 has 8 divisors (see below), whose sum is σ = 25327152. Its totient is φ = 12440960.

The previous prime is 18828391. The next prime is 18828427. The reversal of 18828399 is 99382881.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 18828399 - 2³ = 18828391 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18828391) 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, 27432 + ... + 28109.

It is an arithmetic number, because the mean of its divisors is an integer number (3165894).

Almost surely, 2^18828399 is an apocalyptic number.

18828399 is a deficient number, since it is larger than the sum of its proper divisors (6498753).

18828399 is a wasteful number, since it uses less digits than its factorization.

18828399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55657.

The product of its digits is 248832, while the sum is 48.

The square root of 18828399 is about 4339.1703123984. The cubic root of 18828399 is about 266.0344001716.

The spelling of 18828399 in words is "eighteen million, eight hundred twenty-eight thousand, three hundred ninety-nine".