28666730 has 32 divisors (see below), whose sum is σ = 52842240. Its totient is φ = 11194560.

The previous prime is 28666727. The next prime is 28666733. The reversal of 28666730 is 3766682.

It is an interprime number because it is at equal distance from previous prime (28666727) and next prime (28666733).

It is not an unprimeable number, because it can be changed into a prime (28666733) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 103352 + ... + 103628.

It is an arithmetic number, because the mean of its divisors is an integer number (1651320).

Almost surely, 2^28666730 is an apocalyptic number.

28666730 is a deficient number, since it is larger than the sum of its proper divisors (24175510).

28666730 is a wasteful number, since it uses less digits than its factorization.

28666730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 494.

The product of its (nonzero) digits is 72576, while the sum is 38.

The square root of 28666730 is about 5354.1320491747. The cubic root of 28666730 is about 306.0502359604.

The spelling of 28666730 in words is "twenty-eight million, six hundred sixty-six thousand, seven hundred thirty".