28068975 has 54 divisors (see below), whose sum is σ = 55314168. Its totient is φ = 13596000.

The previous prime is 28068973. The next prime is 28068979. The reversal of 28068975 is 57986082.

It is not a de Polignac number, because 28068975 - 2¹ = 28068973 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 28068975.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28068973) by changing a digit.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 26710 + ... + 27740.

Almost surely, 2^28068975 is an apocalyptic number.

28068975 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28068975 is a deficient number, since it is larger than the sum of its proper divisors (27245193).

28068975 is a wasteful number, since it uses less digits than its factorization.

28068975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1069 (or 1050 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The square root of 28068975 is about 5298.0161381408. The cubic root of 28068975 is about 303.9080364429.

It can be divided in two parts, 2806 and 8975, that added together give a triangular number (11781 = T₁₅₃).

The spelling of 28068975 in words is "twenty-eight million, sixty-eight thousand, nine hundred seventy-five".