28684550 has 12 divisors (see below), whose sum is σ = 53353356. Its totient is φ = 11473800.

The previous prime is 28684529. The next prime is 28684553. The reversal of 28684550 is 5548682.

It is a hoax number, since the sum of its digits (38) 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 (28684553) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 286796 + ... + 286895.

It is an arithmetic number, because the mean of its divisors is an integer number (4446113).

Almost surely, 2^28684550 is an apocalyptic number.

28684550 is a deficient number, since it is larger than the sum of its proper divisors (24668806).

28684550 is a wasteful number, since it uses less digits than its factorization.

28684550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 573703 (or 573698 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 38.

The square root of 28684550 is about 5355.7959259105. The cubic root of 28684550 is about 306.1136391403.

The spelling of 28684550 in words is "twenty-eight million, six hundred eighty-four thousand, five hundred fifty".