28787504 has 10 divisors (see below), whose sum is σ = 55775820. Its totient is φ = 14393744.

The previous prime is 28787501. The next prime is 28787509. The reversal of 28787504 is 40578782.

It is not an unprimeable number, because it can be changed into a prime (28787501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 899594 + ... + 899625.

It is an arithmetic number, because the mean of its divisors is an integer number (5577582).

Almost surely, 2^28787504 is an apocalyptic number.

It is an amenable number.

28787504 is a deficient number, since it is larger than the sum of its proper divisors (26988316).

28787504 is a wasteful number, since it uses less digits than its factorization.

28787504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1799227 (or 1799221 counting only the distinct ones).

The product of its (nonzero) digits is 125440, while the sum is 41.

The square root of 28787504 is about 5365.3987736234. The cubic root of 28787504 is about 306.4794341243.

The spelling of 28787504 in words is "twenty-eight million, seven hundred eighty-seven thousand, five hundred four".