28874866 has 4 divisors (see below), whose sum is σ = 43312302. Its totient is φ = 14437432.

The previous prime is 28874843. The next prime is 28874869. The reversal of 28874866 is 66847882.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 66847882 = 2 ⋅33423941.

It can be written as a sum of positive squares in only one way, i.e., 28847641 + 27225 = 5371^2 + 165^2 .

It is not an unprimeable number, because it can be changed into a prime (28874869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7218715 + ... + 7218718.

Almost surely, 2^28874866 is an apocalyptic number.

28874866 is a deficient number, since it is larger than the sum of its proper divisors (14437436).

28874866 is a wasteful number, since it uses less digits than its factorization.

28874866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14437435.

The product of its digits is 1032192, while the sum is 49.

The square root of 28874866 is about 5373.5338465483. The cubic root of 28874866 is about 306.7891474103.

The spelling of 28874866 in words is "twenty-eight million, eight hundred seventy-four thousand, eight hundred sixty-six".