28818428 has 24 divisors (see below), whose sum is σ = 52039680. Its totient is φ = 13955760.

The previous prime is 28818407. The next prime is 28818457. The reversal of 28818428 is 82481882.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21893 + ... + 23171.

It is an arithmetic number, because the mean of its divisors is an integer number (2168320).

Almost surely, 2^28818428 is an apocalyptic number.

It is an amenable number.

28818428 is a deficient number, since it is larger than the sum of its proper divisors (23221252).

28818428 is a wasteful number, since it uses less digits than its factorization.

28818428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1457 (or 1455 counting only the distinct ones).

The product of its digits is 65536, while the sum is 41.

The square root of 28818428 is about 5368.2797989673. The cubic root of 28818428 is about 306.5891365655.

The spelling of 28818428 in words is "twenty-eight million, eight hundred eighteen thousand, four hundred twenty-eight".