28099668 has 24 divisors (see below), whose sum is σ = 66398080. Its totient is φ = 9247680.

The previous prime is 28099667. The next prime is 28099679. The reversal of 28099668 is 86699082.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28099661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13873 + ... + 15768.

Almost surely, 2^28099668 is an apocalyptic number.

It is an amenable number.

28099668 is an abundant number, since it is smaller than the sum of its proper divisors (38298412).

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

28099668 is a wasteful number, since it uses less digits than its factorization.

28099668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29727 (or 29725 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 48.

The square root of 28099668 is about 5300.9119970058. The cubic root of 28099668 is about 304.0187690397.

The spelling of 28099668 in words is "twenty-eight million, ninety-nine thousand, six hundred sixty-eight".