28838567 has 4 divisors (see below), whose sum is σ = 29244816. Its totient is φ = 28432320.

The previous prime is 28838531. The next prime is 28838569. The reversal of 28838567 is 76583882.

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 28838567 - 2¹² = 28834471 is a prime.

It is a super-2 number, since 2×28838567² = 1663325893226978, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28838569) 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, 203018 + ... + 203159.

It is an arithmetic number, because the mean of its divisors is an integer number (7311204).

Almost surely, 2^28838567 is an apocalyptic number.

28838567 is a deficient number, since it is larger than the sum of its proper divisors (406249).

28838567 is an equidigital number, since it uses as much as digits as its factorization.

28838567 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 406248.

The product of its digits is 645120, while the sum is 47.

The square root of 28838567 is about 5370.1552119096. The cubic root of 28838567 is about 306.6605371858.

The spelling of 28838567 in words is "twenty-eight million, eight hundred thirty-eight thousand, five hundred sixty-seven".