28400283 has 12 divisors (see below), whose sum is σ = 41071888. Its totient is φ = 18910800.

The previous prime is 28400279. The next prime is 28400311. The reversal of 28400283 is 38200482.

It is not a de Polignac number, because 28400283 - 2² = 28400279 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28400243) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9858 + ... + 12408.

Almost surely, 2^28400283 is an apocalyptic number.

28400283 is a deficient number, since it is larger than the sum of its proper divisors (12671605).

28400283 is a wasteful number, since it uses less digits than its factorization.

28400283 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3794 (or 3791 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 27.

The square root of 28400283 is about 5329.1915897254. The cubic root of 28400283 is about 305.0990737893.

The spelling of 28400283 in words is "twenty-eight million, four hundred thousand, two hundred eighty-three".