28267066 has 4 divisors (see below), whose sum is σ = 42400602. Its totient is φ = 14133532.

The previous prime is 28267027. The next prime is 28267067. The reversal of 28267066 is 66076282.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 19140625 + 9126441 = 4375^2 + 3021^2 .

It is not an unprimeable number, because it can be changed into a prime (28267067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7066765 + ... + 7066768.

Almost surely, 2^28267066 is an apocalyptic number.

28267066 is a deficient number, since it is larger than the sum of its proper divisors (14133536).

28267066 is a wasteful number, since it uses less digits than its factorization.

28267066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14133535.

The product of its (nonzero) digits is 48384, while the sum is 37.

The square root of 28267066 is about 5316.6780982113. The cubic root of 28267066 is about 304.6212839547.

The spelling of 28267066 in words is "twenty-eight million, two hundred sixty-seven thousand, sixty-six".