28475284 has 12 divisors (see below), whose sum is σ = 49964544. Its totient is φ = 14199704.

The previous prime is 28475263. The next prime is 28475287. The reversal of 28475284 is 48257482.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28475287) 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, 7762 + ... + 10825.

It is an arithmetic number, because the mean of its divisors is an integer number (4163712).

Almost surely, 2^28475284 is an apocalyptic number.

It is an amenable number.

28475284 is a deficient number, since it is larger than the sum of its proper divisors (21489260).

28475284 is a wasteful number, since it uses less digits than its factorization.

28475284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18974 (or 18972 counting only the distinct ones).

The product of its digits is 143360, while the sum is 40.

The square root of 28475284 is about 5336.2237584269. The cubic root of 28475284 is about 305.3674117469.

The spelling of 28475284 in words is "twenty-eight million, four hundred seventy-five thousand, two hundred eighty-four".