28733275 has 12 divisors (see below), whose sum is σ = 36593392. Its totient is φ = 22364640.

The previous prime is 28733269. The next prime is 28733303. The reversal of 28733275 is 57233782.

It is not a de Polignac number, because 28733275 - 2³ = 28733267 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14607 + ... + 16456.

Almost surely, 2^28733275 is an apocalyptic number.

28733275 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28733275 is a deficient number, since it is larger than the sum of its proper divisors (7860117).

28733275 is a wasteful number, since it uses less digits than its factorization.

28733275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31110 (or 31105 counting only the distinct ones).

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

The square root of 28733275 is about 5360.3428062019. The cubic root of 28733275 is about 306.2868676981.

The spelling of 28733275 in words is "twenty-eight million, seven hundred thirty-three thousand, two hundred seventy-five".