28835231 has 4 divisors (see below), whose sum is σ = 28867200. Its totient is φ = 28803264.

The previous prime is 28835221. The next prime is 28835263. The reversal of 28835231 is 13253882.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13253882 = 2 ⋅6626941.

It is a cyclic number.

It is not a de Polignac number, because 28835231 - 2⁶ = 28835167 is a prime.

It is a super-2 number, since 2×28835231² = 1662941093646722, 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 (28835221) 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, 14591 + ... + 16448.

It is an arithmetic number, because the mean of its divisors is an integer number (7216800).

Almost surely, 2^28835231 is an apocalyptic number.

28835231 is a deficient number, since it is larger than the sum of its proper divisors (31969).

28835231 is an equidigital number, since it uses as much as digits as its factorization.

28835231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31968.

The product of its digits is 11520, while the sum is 32.

The square root of 28835231 is about 5369.8445973790. The cubic root of 28835231 is about 306.6487120606.

The spelling of 28835231 in words is "twenty-eight million, eight hundred thirty-five thousand, two hundred thirty-one".