28414231 has 4 divisors (see below), whose sum is σ = 28838392. Its totient is φ = 27990072.

The previous prime is 28414219. The next prime is 28414237. The reversal of 28414231 is 13241482.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13241482 = 2 ⋅6620741.

It is a cyclic number.

It is not a de Polignac number, because 28414231 - 2⁹ = 28413719 is a prime.

It is a super-2 number, since 2×28414231² = 1614737046642722, which contains 22 as substring.

It is the 5331-st Hogben number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28414196 and 28414205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28414237) by changing a digit.

It is a nontrivial repunit in base 5330.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 211980 + ... + 212113.

It is an arithmetic number, because the mean of its divisors is an integer number (7209598).

Almost surely, 2^28414231 is an apocalyptic number.

28414231 is a deficient number, since it is larger than the sum of its proper divisors (424161).

28414231 is an equidigital number, since it uses as much as digits as its factorization.

28414231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 424160.

The product of its digits is 1536, while the sum is 25.

The square root of 28414231 is about 5330.5000703499. The cubic root of 28414231 is about 305.1490125570.

The spelling of 28414231 in words is "twenty-eight million, four hundred fourteen thousand, two hundred thirty-one".