28238624 has 24 divisors (see below), whose sum is σ = 56428848. Its totient is φ = 13907520.

The previous prime is 28238621. The next prime is 28238633. The reversal of 28238624 is 42683282.

It is not an unprimeable number, because it can be changed into a prime (28238621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4442 + ... + 8729.

It is an arithmetic number, because the mean of its divisors is an integer number (2351202).

Almost surely, 2^28238624 is an apocalyptic number.

It is an amenable number.

28238624 is a deficient number, since it is larger than the sum of its proper divisors (28190224).

28238624 is a wasteful number, since it uses less digits than its factorization.

28238624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13248 (or 13240 counting only the distinct ones).

The product of its digits is 36864, while the sum is 35.

The square root of 28238624 is about 5314.0026345496. The cubic root of 28238624 is about 304.5190808459.

The spelling of 28238624 in words is "twenty-eight million, two hundred thirty-eight thousand, six hundred twenty-four".