28346831 has 4 divisors (see below), whose sum is σ = 28393392. Its totient is φ = 28300272.

The previous prime is 28346797. The next prime is 28346839. The reversal of 28346831 is 13864382.

It is a happy number.

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 28346831 - 2¹⁴ = 28330447 is a prime.

It is a super-3 number, since 3×28346831³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28346791 and 28346800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28346839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22355 + ... + 23588.

It is an arithmetic number, because the mean of its divisors is an integer number (7098348).

Almost surely, 2^28346831 is an apocalyptic number.

28346831 is a deficient number, since it is larger than the sum of its proper divisors (46561).

28346831 is an equidigital number, since it uses as much as digits as its factorization.

28346831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46560.

The product of its digits is 27648, while the sum is 35.

The square root of 28346831 is about 5324.1742082693. The cubic root of 28346831 is about 304.9075452100.

The spelling of 28346831 in words is "twenty-eight million, three hundred forty-six thousand, eight hundred thirty-one".