28782303 has 16 divisors (see below), whose sum is σ = 41959296. Its totient is φ = 17404640.

The previous prime is 28782253. The next prime is 28782319. The reversal of 28782303 is 30328782.

It is a happy number.

It is not a de Polignac number, because 28782303 - 2¹³ = 28774111 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28782373) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21901 + ... + 23177.

It is an arithmetic number, because the mean of its divisors is an integer number (2622456).

Almost surely, 2^28782303 is an apocalyptic number.

28782303 is a deficient number, since it is larger than the sum of its proper divisors (13176993).

28782303 is a wasteful number, since it uses less digits than its factorization.

28782303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1974.

The product of its (nonzero) digits is 16128, while the sum is 33.

The square root of 28782303 is about 5364.9140720053. The cubic root of 28782303 is about 306.4609759357.

The spelling of 28782303 in words is "twenty-eight million, seven hundred eighty-two thousand, three hundred three".