28775624 has 16 divisors (see below), whose sum is σ = 54069120. Its totient is φ = 14357200.

The previous prime is 28775597. The next prime is 28775653. The reversal of 28775624 is 42657782.

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, 449 + ... + 7599.

It is an arithmetic number, because the mean of its divisors is an integer number (3379320).

Almost surely, 2^28775624 is an apocalyptic number.

It is an amenable number.

28775624 is a deficient number, since it is larger than the sum of its proper divisors (25293496).

28775624 is a wasteful number, since it uses less digits than its factorization.

28775624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7660 (or 7656 counting only the distinct ones).

The product of its digits is 188160, while the sum is 41.

The square root of 28775624 is about 5364.2915655285. The cubic root of 28775624 is about 306.4372691090.

The spelling of 28775624 in words is "twenty-eight million, seven hundred seventy-five thousand, six hundred twenty-four".