28442897 has 16 divisors (see below), whose sum is σ = 33628800. Its totient is φ = 23552640.

The previous prime is 28442893. The next prime is 28442929. The reversal of 28442897 is 79824482.

It is a cyclic number.

It is not a de Polignac number, because 28442897 - 2² = 28442893 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28442893) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24629 + ... + 25757.

It is an arithmetic number, because the mean of its divisors is an integer number (2101800).

Almost surely, 2^28442897 is an apocalyptic number.

It is an amenable number.

28442897 is a deficient number, since it is larger than the sum of its proper divisors (5185903).

28442897 is a wasteful number, since it uses less digits than its factorization.

28442897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1256.

The product of its digits is 258048, while the sum is 44.

The square root of 28442897 is about 5333.1882584435. The cubic root of 28442897 is about 305.2515956794.

The spelling of 28442897 in words is "twenty-eight million, four hundred forty-two thousand, eight hundred ninety-seven".