28418819 has 8 divisors (see below), whose sum is σ = 33387312. Its totient is φ = 23847840.

The previous prime is 28418791. The next prime is 28418821. The reversal of 28418819 is 91881482.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28418819 is a prime.

It is a super-2 number, since 2×28418819² = 1615258546709522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28418899) 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 7 ways as a sum of consecutive naturals, for example, 99224 + ... + 99509.

It is an arithmetic number, because the mean of its divisors is an integer number (4173414).

Almost surely, 2^28418819 is an apocalyptic number.

28418819 is a deficient number, since it is larger than the sum of its proper divisors (4968493).

28418819 is a wasteful number, since it uses less digits than its factorization.

28418819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198757.

The product of its digits is 36864, while the sum is 41.

The square root of 28418819 is about 5330.9304065988. The cubic root of 28418819 is about 305.1654356459.

The spelling of 28418819 in words is "twenty-eight million, four hundred eighteen thousand, eight hundred nineteen".