28231695 has 24 divisors (see below), whose sum is σ = 51064416. Its totient is φ = 14401728.

The previous prime is 28231691. The next prime is 28231699. The reversal of 28231695 is 59613282.

It is an interprime number because it is at equal distance from previous prime (28231691) and next prime (28231699).

It is not a de Polignac number, because 28231695 - 2² = 28231691 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28231691) 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 23 ways as a sum of consecutive naturals, for example, 12604 + ... + 14673.

It is an arithmetic number, because the mean of its divisors is an integer number (2127684).

Almost surely, 2^28231695 is an apocalyptic number.

28231695 is a deficient number, since it is larger than the sum of its proper divisors (22832721).

28231695 is a wasteful number, since it uses less digits than its factorization.

28231695 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27311 (or 27308 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 28231695 is about 5313.3506377803. The cubic root of 28231695 is about 304.4941718735.

The spelling of 28231695 in words is "twenty-eight million, two hundred thirty-one thousand, six hundred ninety-five".