28331874 has 24 divisors (see below), whose sum is σ = 61839180. Its totient is φ = 9374208.

The previous prime is 28331873. The next prime is 28331879. The reversal of 28331874 is 47813382.

It can be written as a sum of positive squares in 2 ways, for example, as 28037025 + 294849 = 5295^2 + 543^2 .

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28331873) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3279 + ... + 8210.

Almost surely, 2^28331874 is an apocalyptic number.

28331874 is an abundant number, since it is smaller than the sum of its proper divisors (33507306).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28331874 is a wasteful number, since it uses less digits than its factorization.

28331874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11634 (or 11631 counting only the distinct ones).

The product of its digits is 32256, while the sum is 36.

The square root of 28331874 is about 5322.7693919613. The cubic root of 28331874 is about 304.8539083561.

The spelling of 28331874 in words is "twenty-eight million, three hundred thirty-one thousand, eight hundred seventy-four".