28228542 has 32 divisors (see below), whose sum is σ = 59525280. Its totient is φ = 8910720.

The previous prime is 28228523. The next prime is 28228553. The reversal of 28228542 is 24582282.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7692 + ... + 10752.

It is an arithmetic number, because the mean of its divisors is an integer number (1860165).

Almost surely, 2^28228542 is an apocalyptic number.

28228542 is an abundant number, since it is smaller than the sum of its proper divisors (31296738).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28228542 is a wasteful number, since it uses less digits than its factorization.

28228542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3148.

The product of its digits is 20480, while the sum is 33.

The square root of 28228542 is about 5313.0539240629. The cubic root of 28228542 is about 304.4828358454.

The spelling of 28228542 in words is "twenty-eight million, two hundred twenty-eight thousand, five hundred forty-two".