28004488 has 16 divisors (see below), whose sum is σ = 54319500. Its totient is φ = 13519296.

The previous prime is 28004477. The next prime is 28004489. The reversal of 28004488 is 88440082.

It can be written as a sum of positive squares in 2 ways, for example, as 27688644 + 315844 = 5262^2 + 562^2 .

It is not an unprimeable number, because it can be changed into a prime (28004489) 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, 60123 + ... + 60586.

Almost surely, 2^28004488 is an apocalyptic number.

It is an amenable number.

28004488 is a deficient number, since it is larger than the sum of its proper divisors (26315012).

28004488 is a wasteful number, since it uses less digits than its factorization.

28004488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120744 (or 120740 counting only the distinct ones).

The product of its (nonzero) digits is 16384, while the sum is 34.

The square root of 28004488 is about 5291.9266812759. The cubic root of 28004488 is about 303.6751203819.

The spelling of 28004488 in words is "twenty-eight million, four thousand, four hundred eighty-eight".