28239244 has 48 divisors (see below), whose sum is σ = 60117120. Its totient is φ = 11439360.

The previous prime is 28239209. The next prime is 28239259. The reversal of 28239244 is 44293282.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13219 + ... + 15205.

It is an arithmetic number, because the mean of its divisors is an integer number (1252440).

Almost surely, 2^28239244 is an apocalyptic number.

It is an amenable number.

28239244 is an abundant number, since it is smaller than the sum of its proper divisors (31877876).

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

28239244 is a wasteful number, since it uses less digits than its factorization.

28239244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2038 (or 2036 counting only the distinct ones).

The product of its digits is 27648, while the sum is 34.

The square root of 28239244 is about 5314.0609706702. The cubic root of 28239244 is about 304.5213094773.

The spelling of 28239244 in words is "twenty-eight million, two hundred thirty-nine thousand, two hundred forty-four".