28999866 has 24 divisors (see below), whose sum is σ = 67469760. Its totient is φ = 8285592.

The previous prime is 28999853. The next prime is 28999891. The reversal of 28999866 is 66899982.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 49026 + ... + 49613.

It is an arithmetic number, because the mean of its divisors is an integer number (2811240).

Almost surely, 2^28999866 is an apocalyptic number.

28999866 is an abundant number, since it is smaller than the sum of its proper divisors (38469894).

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

28999866 is a wasteful number, since it uses less digits than its factorization.

28999866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98658 (or 98651 counting only the distinct ones).

The product of its digits is 3359232, while the sum is 57.

The square root of 28999866 is about 5385.1523655325. The cubic root of 28999866 is about 307.2312093604.

The spelling of 28999866 in words is "twenty-eight million, nine hundred ninety-nine thousand, eight hundred sixty-six".