28867875 has 32 divisors (see below), whose sum is σ = 50139648. Its totient is φ = 14722400.

The previous prime is 28867873. The next prime is 28867877. The reversal of 28867875 is 57876882.

It is an interprime number because it is at equal distance from previous prime (28867873) and next prime (28867877).

It is not a de Polignac number, because 28867875 - 2¹ = 28867873 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28867873) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6952 + ... + 10298.

It is an arithmetic number, because the mean of its divisors is an integer number (1566864).

Almost surely, 2^28867875 is an apocalyptic number.

28867875 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28867875 is a deficient number, since it is larger than the sum of its proper divisors (21271773).

28867875 is a wasteful number, since it uses less digits than its factorization.

28867875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3388 (or 3378 counting only the distinct ones).

The product of its digits is 1505280, while the sum is 51.

The square root of 28867875 is about 5372.8833041487. The cubic root of 28867875 is about 306.7643861289.

It can be divided in two parts, 28 and 867875, that added together give a triangular number (867903 = T₁₃₁₇).

The spelling of 28867875 in words is "twenty-eight million, eight hundred sixty-seven thousand, eight hundred seventy-five".