28699966 has 24 divisors (see below), whose sum is σ = 45278064. Its totient is φ = 13641600.

The previous prime is 28699949. The next prime is 28699969. The reversal of 28699966 is 66999682.

Its product of digits (2519424) is a multiple of the sum of its prime factors (324).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28699969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 189991 + ... + 190141.

It is an arithmetic number, because the mean of its divisors is an integer number (1886586).

Almost surely, 2^28699966 is an apocalyptic number.

28699966 is a deficient number, since it is larger than the sum of its proper divisors (16578098).

28699966 is a wasteful number, since it uses less digits than its factorization.

28699966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324 (or 295 counting only the distinct ones).

The product of its digits is 2519424, while the sum is 55.

The square root of 28699966 is about 5357.2349211137. The cubic root of 28699966 is about 306.1684677585.

It can be divided in two parts, 2 and 8699966, that added together give a palindrome (8699968).

The spelling of 28699966 in words is "twenty-eight million, six hundred ninety-nine thousand, nine hundred sixty-six".