28870550 has 24 divisors (see below), whose sum is σ = 54386400. Its totient is φ = 11400480.

The previous prime is 28870511. The next prime is 28870553. The reversal of 28870550 is 5507882.

It is a self number, because there is not a number n which added to its sum of digits gives 28870550.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28870553) 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 11 ways as a sum of consecutive naturals, for example, 296 + ... + 7604.

It is an arithmetic number, because the mean of its divisors is an integer number (2266100).

Almost surely, 2^28870550 is an apocalyptic number.

28870550 is a deficient number, since it is larger than the sum of its proper divisors (25515850).

28870550 is a wasteful number, since it uses less digits than its factorization.

28870550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7400 (or 7395 counting only the distinct ones).

The product of its (nonzero) digits is 22400, while the sum is 35.

The square root of 28870550 is about 5373.1322336231. The cubic root of 28870550 is about 306.7738611293.

The spelling of 28870550 in words is "twenty-eight million, eight hundred seventy thousand, five hundred fifty".