18828417 has 4 divisors (see below), whose sum is σ = 25104560. Its totient is φ = 12552276.

The previous prime is 18828391. The next prime is 18828427. The reversal of 18828417 is 71482881.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 18828417 - 2⁶ = 18828353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18828427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3138067 + ... + 3138072.

It is an arithmetic number, because the mean of its divisors is an integer number (6276140).

Almost surely, 2^18828417 is an apocalyptic number.

It is an amenable number.

18828417 is a deficient number, since it is larger than the sum of its proper divisors (6276143).

18828417 is an equidigital number, since it uses as much as digits as its factorization.

18828417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6276142.

The product of its digits is 28672, while the sum is 39.

The square root of 18828417 is about 4339.1723865272. The cubic root of 18828417 is about 266.0344849481.

The spelling of 18828417 in words is "eighteen million, eight hundred twenty-eight thousand, four hundred seventeen".