28666674 has 24 divisors (see below), whose sum is σ = 64254060. Its totient is φ = 9225888.

The previous prime is 28666643. The next prime is 28666721. The reversal of 28666674 is 47666682.

It can be written as a sum of positive squares in 2 ways, for example, as 28547649 + 119025 = 5343^2 + 345^2 .

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26937 + ... + 27980.

Almost surely, 2^28666674 is an apocalyptic number.

28666674 is an abundant number, since it is smaller than the sum of its proper divisors (35587386).

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

28666674 is a wasteful number, since it uses less digits than its factorization.

28666674 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54954 (or 54951 counting only the distinct ones).

The product of its digits is 580608, while the sum is 45.

The square root of 28666674 is about 5354.1268195664. The cubic root of 28666674 is about 306.0500366722.

The spelling of 28666674 in words is "twenty-eight million, six hundred sixty-six thousand, six hundred seventy-four".