28551284 has 12 divisors (see below), whose sum is σ = 50023008. Its totient is φ = 14259000.

The previous prime is 28551247. The next prime is 28551287. The reversal of 28551284 is 48215582.

It is a happy number.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28551287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 209 + ... + 7559.

It is an arithmetic number, because the mean of its divisors is an integer number (4168584).

Almost surely, 2^28551284 is an apocalyptic number.

It is an amenable number.

28551284 is a deficient number, since it is larger than the sum of its proper divisors (21471724).

28551284 is a wasteful number, since it uses less digits than its factorization.

28551284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8326 (or 8324 counting only the distinct ones).

The product of its digits is 25600, while the sum is 35.

The square root of 28551284 is about 5343.3401538738. The cubic root of 28551284 is about 305.6388437097.

The spelling of 28551284 in words is "twenty-eight million, five hundred fifty-one thousand, two hundred eighty-four".