28825784 has 32 divisors (see below), whose sum is σ = 60090240. Its totient is φ = 12873600.

The previous prime is 28825723. The next prime is 28825789. The reversal of 28825784 is 48752882.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28825789) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1247 + ... + 7694.

It is an arithmetic number, because the mean of its divisors is an integer number (1877820).

Almost surely, 2^28825784 is an apocalyptic number.

It is an amenable number.

28825784 is an abundant number, since it is smaller than the sum of its proper divisors (31264456).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28825784 is a wasteful number, since it uses less digits than its factorization.

28825784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8991 (or 8987 counting only the distinct ones).

The product of its digits is 286720, while the sum is 44.

The square root of 28825784 is about 5368.9648909264. The cubic root of 28825784 is about 306.6152203133.

The spelling of 28825784 in words is "twenty-eight million, eight hundred twenty-five thousand, seven hundred eighty-four".