28001066 has 16 divisors (see below), whose sum is σ = 44274600. Its totient is φ = 13261248.

The previous prime is 28001063. The next prime is 28001069. The reversal of 28001066 is 66010082.

It is an interprime number because it is at equal distance from previous prime (28001063) and next prime (28001069).

It can be written as a sum of positive squares in 4 ways, for example, as 21855625 + 6145441 = 4675^2 + 2479^2 .

It is not an unprimeable number, because it can be changed into a prime (28001063) 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, 1481 + ... + 7628.

Almost surely, 2^28001066 is an apocalyptic number.

28001066 is a deficient number, since it is larger than the sum of its proper divisors (16273534).

28001066 is a wasteful number, since it uses less digits than its factorization.

28001066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9193.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 28001066 is about 5291.6033487025. The cubic root of 28001066 is about 303.6627507147.

The spelling of 28001066 in words is "twenty-eight million, one thousand, sixty-six".