28997284 has 12 divisors (see below), whose sum is σ = 51030000. Its totient is φ = 14417288.

The previous prime is 28997239. The next prime is 28997299. The reversal of 28997284 is 48279982.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19534 + ... + 20965.

It is an arithmetic number, because the mean of its divisors is an integer number (4252500).

Almost surely, 2^28997284 is an apocalyptic number.

It is an amenable number.

28997284 is a deficient number, since it is larger than the sum of its proper divisors (22032716).

28997284 is a wasteful number, since it uses less digits than its factorization.

28997284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40682 (or 40680 counting only the distinct ones).

The product of its digits is 580608, while the sum is 49.

The square root of 28997284 is about 5384.9126269606. The cubic root of 28997284 is about 307.2220909904. Note that the first 3 decimals are identical.

The spelling of 28997284 in words is "twenty-eight million, nine hundred ninety-seven thousand, two hundred eighty-four".