28871415 has 24 divisors (see below), whose sum is σ = 50537760. Its totient is φ = 15246144.

The previous prime is 28871413. The next prime is 28871429. The reversal of 28871415 is 51417882.

It is not a de Polignac number, because 28871415 - 2¹ = 28871413 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28871415.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28871411) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1521 + ... + 7749.

It is an arithmetic number, because the mean of its divisors is an integer number (2105740).

Almost surely, 2^28871415 is an apocalyptic number.

28871415 is a deficient number, since it is larger than the sum of its proper divisors (21666345).

28871415 is a wasteful number, since it uses less digits than its factorization.

28871415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6343 (or 6340 counting only the distinct ones).

The product of its digits is 17920, while the sum is 36.

The square root of 28871415 is about 5373.2127261072. The cubic root of 28871415 is about 306.7769248828.

The spelling of 28871415 in words is "twenty-eight million, eight hundred seventy-one thousand, four hundred fifteen".