28242188 has 24 divisors (see below), whose sum is σ = 53752608. Its totient is φ = 12905856.

The previous prime is 28242119. The next prime is 28242199. The reversal of 28242188 is 88124282.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2720 + ... + 7992.

It is an arithmetic number, because the mean of its divisors is an integer number (2239692).

Almost surely, 2^28242188 is an apocalyptic number.

It is an amenable number.

28242188 is a deficient number, since it is larger than the sum of its proper divisors (25510420).

28242188 is a wasteful number, since it uses less digits than its factorization.

28242188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5393 (or 5391 counting only the distinct ones).

The product of its digits is 16384, while the sum is 35.

The square root of 28242188 is about 5314.3379644129. The cubic root of 28242188 is about 304.5318914364.

The spelling of 28242188 in words is "twenty-eight million, two hundred forty-two thousand, one hundred eighty-eight".