28867975 has 18 divisors (see below), whose sum is σ = 37143456. Its totient is φ = 22233600.

The previous prime is 28867939. The next prime is 28867999. The reversal of 28867975 is 57976882.

It is not a de Polignac number, because 28867975 - 2¹³ = 28859783 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 149479 + ... + 149671.

Almost surely, 2^28867975 is an apocalyptic number.

28867975 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28867975 is a deficient number, since it is larger than the sum of its proper divisors (8275481).

28867975 is an equidigital number, since it uses as much as digits as its factorization.

28867975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 427 (or 229 counting only the distinct ones).

The product of its digits is 1693440, while the sum is 52.

The square root of 28867975 is about 5372.8926101310. The cubic root of 28867975 is about 306.7647403450.

The spelling of 28867975 in words is "twenty-eight million, eight hundred sixty-seven thousand, nine hundred seventy-five".