28897375 has 16 divisors (see below), whose sum is σ = 38840256. Its totient is φ = 21338400.

The previous prime is 28897373. The next prime is 28897391. The reversal of 28897375 is 57379882.

It is not a de Polignac number, because 28897375 - 2¹ = 28897373 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28897373) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7267 + ... + 10516.

It is an arithmetic number, because the mean of its divisors is an integer number (2427516).

Almost surely, 2^28897375 is an apocalyptic number.

28897375 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28897375 is a deficient number, since it is larger than the sum of its proper divisors (9942881).

28897375 is a wasteful number, since it uses less digits than its factorization.

28897375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17811 (or 17801 counting only the distinct ones).

The product of its digits is 846720, while the sum is 49.

The square root of 28897375 is about 5375.6278703050. The cubic root of 28897375 is about 306.8688444419.

The spelling of 28897375 in words is "twenty-eight million, eight hundred ninety-seven thousand, three hundred seventy-five".