28334331 has 6 divisors (see below), whose sum is σ = 40927380. Its totient is φ = 18889548.

The previous prime is 28334311. The next prime is 28334333. The reversal of 28334331 is 13343382.

It is not a de Polignac number, because 28334331 - 2¹⁰ = 28333307 is a prime.

It is a super-2 number, since 2×28334331² = 1605668626435122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28334295 and 28334304.

It is not an unprimeable number, because it can be changed into a prime (28334333) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1574121 + ... + 1574138.

It is an arithmetic number, because the mean of its divisors is an integer number (6821230).

Almost surely, 2^28334331 is an apocalyptic number.

28334331 is a deficient number, since it is larger than the sum of its proper divisors (12593049).

28334331 is a wasteful number, since it uses less digits than its factorization.

28334331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3148265 (or 3148262 counting only the distinct ones).

The product of its digits is 5184, while the sum is 27.

The square root of 28334331 is about 5323.0001878640. Note that the first 3 decimals coincide. The cubic root of 28334331 is about 304.8627206265.

The spelling of 28334331 in words is "twenty-eight million, three hundred thirty-four thousand, three hundred thirty-one".