28001466 has 12 divisors (see below), whose sum is σ = 60669882. Its totient is φ = 9333816.

The previous prime is 28001417. The next prime is 28001473. The reversal of 28001466 is 66410082.

It can be written as a sum of positive squares in only one way, i.e., 25796241 + 2205225 = 5079^2 + 1485^2 .

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 777801 + ... + 777836.

Almost surely, 2^28001466 is an apocalyptic number.

28001466 is an abundant number, since it is smaller than the sum of its proper divisors (32668416).

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

28001466 is a wasteful number, since it uses less digits than its factorization.

28001466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1555645 (or 1555642 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 28001466 is about 5291.6411442954. The cubic root of 28001466 is about 303.6641966658.

The spelling of 28001466 in words is "twenty-eight million, one thousand, four hundred sixty-six".