28346866 has 4 divisors (see below), whose sum is σ = 42520302. Its totient is φ = 14173432.

The previous prime is 28346863. The next prime is 28346869. The reversal of 28346866 is 66864382.

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

It is an interprime number because it is at equal distance from previous prime (28346863) and next prime (28346869).

It can be written as a sum of positive squares in only one way, i.e., 17816841 + 10530025 = 4221^2 + 3245^2 .

It is a super-3 number, since 3×28346866³ (a number of 23 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (28346863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7086715 + ... + 7086718.

Almost surely, 2^28346866 is an apocalyptic number.

28346866 is a deficient number, since it is larger than the sum of its proper divisors (14173436).

28346866 is a wasteful number, since it uses less digits than its factorization.

28346866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14173435.

The product of its digits is 331776, while the sum is 43.

The square root of 28346866 is about 5324.1774951630. The cubic root of 28346866 is about 304.9076707003.

The spelling of 28346866 in words is "twenty-eight million, three hundred forty-six thousand, eight hundred sixty-six".