28870475 has 6 divisors (see below), whose sum is σ = 35799420. Its totient is φ = 23096360.

The previous prime is 28870469. The next prime is 28870477. The reversal of 28870475 is 57407882.

It is not a de Polignac number, because 28870475 - 2¹² = 28866379 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28870477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 577385 + ... + 577434.

It is an arithmetic number, because the mean of its divisors is an integer number (5966570).

Almost surely, 2^28870475 is an apocalyptic number.

28870475 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28870475 is a deficient number, since it is larger than the sum of its proper divisors (6928945).

28870475 is a wasteful number, since it uses less digits than its factorization.

28870475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1154829 (or 1154824 counting only the distinct ones).

The product of its (nonzero) digits is 125440, while the sum is 41.

The square root of 28870475 is about 5373.1252544492. The cubic root of 28870475 is about 306.7735954831.

The spelling of 28870475 in words is "twenty-eight million, eight hundred seventy thousand, four hundred seventy-five".