28890283 has 6 divisors (see below), whose sum is σ = 29136732. Its totient is φ = 28644840.

The previous prime is 28890263. The next prime is 28890307. The reversal of 28890283 is 38209882.

It is a de Polignac number, because none of the positive numbers 2^k-28890283 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28890263) 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, 68413 + ... + 68833.

It is an arithmetic number, because the mean of its divisors is an integer number (4856122).

Almost surely, 2^28890283 is an apocalyptic number.

28890283 is a deficient number, since it is larger than the sum of its proper divisors (246449).

28890283 is an frugal number, since it uses more digits than its factorization.

28890283 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1005 (or 584 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 40.

The square root of 28890283 is about 5374.9681859524. The cubic root of 28890283 is about 306.8437384486.

The spelling of 28890283 in words is "twenty-eight million, eight hundred ninety thousand, two hundred eighty-three".