28239304 has 32 divisors (see below), whose sum is σ = 54774720. Its totient is φ = 13640256.

The previous prime is 28239287. The next prime is 28239307. The reversal of 28239304 is 40393282.

It is not an unprimeable number, because it can be changed into a prime (28239307) 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, 35034 + ... + 35830.

It is an arithmetic number, because the mean of its divisors is an integer number (1711710).

Almost surely, 2^28239304 is an apocalyptic number.

It is an amenable number.

28239304 is a deficient number, since it is larger than the sum of its proper divisors (26535416).

28239304 is a wasteful number, since it uses less digits than its factorization.

28239304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 949 (or 945 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 28239304 is about 5314.0666160672. The cubic root of 28239304 is about 304.5215251495.

The spelling of 28239304 in words is "twenty-eight million, two hundred thirty-nine thousand, three hundred four".