28338871 has 4 divisors (see below), whose sum is σ = 30915144. Its totient is φ = 25762600.

The previous prime is 28338859. The next prime is 28338889. The reversal of 28338871 is 17883382.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28338871 - 2⁵ = 28338839 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28338811) 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, 1288120 + ... + 1288141.

It is an arithmetic number, because the mean of its divisors is an integer number (7728786).

Almost surely, 2^28338871 is an apocalyptic number.

28338871 is a deficient number, since it is larger than the sum of its proper divisors (2576273).

28338871 is a wasteful number, since it uses less digits than its factorization.

28338871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2576272.

The product of its digits is 64512, while the sum is 40.

The square root of 28338871 is about 5323.4266220171. The cubic root of 28338871 is about 304.8790024395.

The spelling of 28338871 in words is "twenty-eight million, three hundred thirty-eight thousand, eight hundred seventy-one".