28783604 has 12 divisors (see below), whose sum is σ = 50409828. Its totient is φ = 14380800.

The previous prime is 28783597. The next prime is 28783607. The reversal of 28783604 is 40638782.

It can be written as a sum of positive squares in 2 ways, for example, as 25020004 + 3763600 = 5002^2 + 1940^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28783607) 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, 6884 + ... + 10244.

It is an arithmetic number, because the mean of its divisors is an integer number (4200819).

Almost surely, 2^28783604 is an apocalyptic number.

It is an amenable number.

28783604 is a deficient number, since it is larger than the sum of its proper divisors (21626224).

28783604 is a wasteful number, since it uses less digits than its factorization.

28783604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5506 (or 5504 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 38.

The square root of 28783604 is about 5365.0353214122. The cubic root of 28783604 is about 306.4655933531.

The spelling of 28783604 in words is "twenty-eight million, seven hundred eighty-three thousand, six hundred four".