28871417 has 4 divisors (see below), whose sum is σ = 30126720. Its totient is φ = 27616116.

The previous prime is 28871413. The next prime is 28871429. The reversal of 28871417 is 71417882.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28871417 - 2² = 28871413 is a prime.

It is a Duffinian 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 3 ways as a sum of consecutive naturals, for example, 627617 + ... + 627662.

It is an arithmetic number, because the mean of its divisors is an integer number (7531680).

Almost surely, 2^28871417 is an apocalyptic number.

It is an amenable number.

28871417 is a deficient number, since it is larger than the sum of its proper divisors (1255303).

28871417 is a wasteful number, since it uses less digits than its factorization.

28871417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1255302.

The product of its digits is 25088, while the sum is 38.

The square root of 28871417 is about 5373.2129122156. The cubic root of 28871417 is about 306.7769319665.

The spelling of 28871417 in words is "twenty-eight million, eight hundred seventy-one thousand, four hundred seventeen".