28370 has 8 divisors (see below), whose sum is σ = 51084. Its totient is φ = 11344.

The previous prime is 28351. The next prime is 28387. The reversal of 28370 is 7382.

28370 = 43² + 44² + ... + 54².

It can be written as a sum of positive squares in 2 ways, for example, as 24649 + 3721 = 157^2 + 61^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a nialpdrome in base 13.

It is an unprimeable number.

28370 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1409 + ... + 1428.

2²⁸³⁷⁰ is an apocalyptic number.

28370 is a deficient number, since it is larger than the sum of its proper divisors (22714).

28370 is a wasteful number, since it uses less digits than its factorization.

28370 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2844.

The product of its (nonzero) digits is 336, while the sum is 20.

The square root of 28370 is about 168.4339633209. The cubic root of 28370 is about 30.4990593636.

It can be divided in two parts, 283 and 70, that added together give a palindrome (353).

The spelling of 28370 in words is "twenty-eight thousand, three hundred seventy".