28981283 has 4 divisors (see below), whose sum is σ = 29456448. Its totient is φ = 28506120.

The previous prime is 28981259. The next prime is 28981291. The reversal of 28981283 is 38218982.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28981283 - 2¹² = 28977187 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28981283.

It is not an unprimeable number, because it can be changed into a prime (28911283) 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, 237491 + ... + 237612.

It is an arithmetic number, because the mean of its divisors is an integer number (7364112).

Almost surely, 2^28981283 is an apocalyptic number.

28981283 is a deficient number, since it is larger than the sum of its proper divisors (475165).

28981283 is an equidigital number, since it uses as much as digits as its factorization.

28981283 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 475164.

The product of its digits is 55296, while the sum is 41.

The square root of 28981283 is about 5383.4266968168. The cubic root of 28981283 is about 307.1655711549.

The spelling of 28981283 in words is "twenty-eight million, nine hundred eighty-one thousand, two hundred eighty-three".