28312975 has 6 divisors (see below), whose sum is σ = 35108120. Its totient is φ = 22650360.

The previous prime is 28312957. The next prime is 28312981. The reversal of 28312975 is 57921382.

It is not a de Polignac number, because 28312975 - 2⁵ = 28312943 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 566235 + ... + 566284.

Almost surely, 2^28312975 is an apocalyptic number.

28312975 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28312975 is a deficient number, since it is larger than the sum of its proper divisors (6795145).

28312975 is a wasteful number, since it uses less digits than its factorization.

28312975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1132529 (or 1132524 counting only the distinct ones).

The product of its digits is 30240, while the sum is 37.

The square root of 28312975 is about 5320.9937981546. The cubic root of 28312975 is about 304.7861082104.

The spelling of 28312975 in words is "twenty-eight million, three hundred twelve thousand, nine hundred seventy-five".