28789966 has 4 divisors (see below), whose sum is σ = 43184952. Its totient is φ = 14394982.

The previous prime is 28789933. The next prime is 28789973. The reversal of 28789966 is 66998782.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7197490 + ... + 7197493.

It is an arithmetic number, because the mean of its divisors is an integer number (10796238).

Almost surely, 2^28789966 is an apocalyptic number.

28789966 is a deficient number, since it is larger than the sum of its proper divisors (14394986).

28789966 is a wasteful number, since it uses less digits than its factorization.

28789966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14394985.

The product of its digits is 2612736, while the sum is 55.

The square root of 28789966 is about 5365.6282018045. The cubic root of 28789966 is about 306.4881709112.

The spelling of 28789966 in words is "twenty-eight million, seven hundred eighty-nine thousand, nine hundred sixty-six".