28323775 has 12 divisors (see below), whose sum is σ = 36970600. Its totient is φ = 21466080.

The previous prime is 28323767. The next prime is 28323797. The reversal of 28323775 is 57732382.

It is not a de Polignac number, because 28323775 - 2³ = 28323767 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29340 + ... + 30289.

Almost surely, 2^28323775 is an apocalyptic number.

28323775 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28323775 is a deficient number, since it is larger than the sum of its proper divisors (8646825).

28323775 is a wasteful number, since it uses less digits than its factorization.

28323775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59658 (or 59653 counting only the distinct ones).

The product of its digits is 70560, while the sum is 37.

The square root of 28323775 is about 5322.0085494106. The cubic root of 28323775 is about 304.8248568938.

It can be divided in two parts, 2832377 and 5, that added together give a palindrome (2832382).

The spelling of 28323775 in words is "twenty-eight million, three hundred twenty-three thousand, seven hundred seventy-five".