28442170 has 16 divisors (see below), whose sum is σ = 51961248. Its totient is φ = 11206800.

The previous prime is 28442153. The next prime is 28442179. The reversal of 28442170 is 7124482.

It is not an unprimeable number, because it can be changed into a prime (28442179) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20556 + ... + 21895.

It is an arithmetic number, because the mean of its divisors is an integer number (3247578).

Almost surely, 2^28442170 is an apocalyptic number.

28442170 is a deficient number, since it is larger than the sum of its proper divisors (23519078).

28442170 is a wasteful number, since it uses less digits than its factorization.

28442170 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42525.

The product of its (nonzero) digits is 3584, while the sum is 28.

The square root of 28442170 is about 5333.1200999040. The cubic root of 28442170 is about 305.2489949152.

The spelling of 28442170 in words is "twenty-eight million, four hundred forty-two thousand, one hundred seventy".