28387283 has 2 divisors, whose sum is σ = 28387284. Its totient is φ = 28387282.

The previous prime is 28387279. The next prime is 28387309. The reversal of 28387283 is 38278382.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28387283 - 2² = 28387279 is a prime.

It is a super-2 number, since 2×28387283² = 1611675672244178, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28387283.

It is not a weakly prime, because it can be changed into another prime (28387213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14193641 + 14193642.

It is an arithmetic number, because the mean of its divisors is an integer number (14193642).

Almost surely, 2^28387283 is an apocalyptic number.

28387283 is a deficient number, since it is larger than the sum of its proper divisors (1).

28387283 is an equidigital number, since it uses as much as digits as its factorization.

28387283 is an evil number, because the sum of its binary digits is even.

The product of its digits is 129024, while the sum is 41.

The square root of 28387283 is about 5327.9717529281. The cubic root of 28387283 is about 305.0525144728.

The spelling of 28387283 in words is "twenty-eight million, three hundred eighty-seven thousand, two hundred eighty-three".