28664574 has 16 divisors (see below), whose sum is σ = 58662912. Its totient is φ = 9332568.

The previous prime is 28664569. The next prime is 28664579. The reversal of 28664574 is 47546682.

It is an interprime number because it is at equal distance from previous prime (28664569) and next prime (28664579).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28664579) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55294 + ... + 55809.

It is an arithmetic number, because the mean of its divisors is an integer number (3666432).

Almost surely, 2^28664574 is an apocalyptic number.

28664574 is an abundant number, since it is smaller than the sum of its proper divisors (29998338).

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

28664574 is a wasteful number, since it uses less digits than its factorization.

28664574 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111151.

The product of its digits is 322560, while the sum is 42.

The square root of 28664574 is about 5353.9307055658. The cubic root of 28664574 is about 306.0425631767.

The spelling of 28664574 in words is "twenty-eight million, six hundred sixty-four thousand, five hundred seventy-four".