28242178 has 16 divisors (see below), whose sum is σ = 43879680. Its totient is φ = 13618800.

The previous prime is 28242119. The next prime is 28242199. The reversal of 28242178 is 87124282.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23533 + ... + 24703.

It is an arithmetic number, because the mean of its divisors is an integer number (2742480).

Almost surely, 2^28242178 is an apocalyptic number.

28242178 is a deficient number, since it is larger than the sum of its proper divisors (15637502).

28242178 is a wasteful number, since it uses less digits than its factorization.

28242178 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1593.

The product of its digits is 14336, while the sum is 34.

The square root of 28242178 is about 5314.3370235618. The cubic root of 28242178 is about 304.5318554935.

The spelling of 28242178 in words is "twenty-eight million, two hundred forty-two thousand, one hundred seventy-eight".