28458258 has 16 divisors (see below), whose sum is σ = 56977536. Its totient is φ = 9475920.

The previous prime is 28458239. The next prime is 28458263. The reversal of 28458258 is 85285482.

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, 5460 + ... + 9312.

It is an arithmetic number, because the mean of its divisors is an integer number (3561096).

Almost surely, 2^28458258 is an apocalyptic number.

28458258 is an abundant number, since it is smaller than the sum of its proper divisors (28519278).

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

28458258 is a wasteful number, since it uses less digits than its factorization.

28458258 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5089.

The product of its digits is 204800, while the sum is 42.

The square root of 28458258 is about 5334.6281969787. The cubic root of 28458258 is about 305.3065376437.

The spelling of 28458258 in words is "twenty-eight million, four hundred fifty-eight thousand, two hundred fifty-eight".