28817847 has 6 divisors (see below), whose sum is σ = 41625792. Its totient is φ = 19211892.

The previous prime is 28817843. The next prime is 28817863. The reversal of 28817847 is 74871882.

It is not a de Polignac number, because 28817847 - 2² = 28817843 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28817843) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1600983 + ... + 1601000.

It is an arithmetic number, because the mean of its divisors is an integer number (6937632).

Almost surely, 2^28817847 is an apocalyptic number.

28817847 is a deficient number, since it is larger than the sum of its proper divisors (12807945).

28817847 is a wasteful number, since it uses less digits than its factorization.

28817847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3201989 (or 3201986 counting only the distinct ones).

The product of its digits is 200704, while the sum is 45.

The square root of 28817847 is about 5368.2256845256. The cubic root of 28817847 is about 306.5870762000.

The spelling of 28817847 in words is "twenty-eight million, eight hundred seventeen thousand, eight hundred forty-seven".