28666670 has 8 divisors (see below), whose sum is σ = 51600024. Its totient is φ = 11466664.

The previous prime is 28666643. The next prime is 28666721. The reversal of 28666670 is 7666682.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1433324 + ... + 1433343.

It is an arithmetic number, because the mean of its divisors is an integer number (6450003).

Almost surely, 2^28666670 is an apocalyptic number.

28666670 is a deficient number, since it is larger than the sum of its proper divisors (22933354).

28666670 is a wasteful number, since it uses less digits than its factorization.

28666670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2866674.

The product of its (nonzero) digits is 145152, while the sum is 41.

The square root of 28666670 is about 5354.1264460227. The cubic root of 28666670 is about 306.0500224373.

The spelling of 28666670 in words is "twenty-eight million, six hundred sixty-six thousand, six hundred seventy".