28785004 has 6 divisors (see below), whose sum is σ = 50373764. Its totient is φ = 14392500.

The previous prime is 28784999. The next prime is 28785007. The reversal of 28785004 is 40058782.

It is not an unprimeable number, because it can be changed into a prime (28785007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3598122 + ... + 3598129.

Almost surely, 2^28785004 is an apocalyptic number.

It is an amenable number.

28785004 is a deficient number, since it is larger than the sum of its proper divisors (21588760).

28785004 is a wasteful number, since it uses less digits than its factorization.

28785004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7196255 (or 7196253 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 34.

The square root of 28785004 is about 5365.1657942695. The cubic root of 28785004 is about 306.4705619789.

The spelling of 28785004 in words is "twenty-eight million, seven hundred eighty-five thousand, four".