728914666 has 8 divisors (see below), whose sum is σ = 1140909984. Its totient is φ = 348611340.

The previous prime is 728914631. The next prime is 728914673. The reversal of 728914666 is 666419827.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7922940 + ... + 7923031.

It is an arithmetic number, because the mean of its divisors is an integer number (142613748).

Almost surely, 2^728914666 is an apocalyptic number.

728914666 is a deficient number, since it is larger than the sum of its proper divisors (411995318).

728914666 is a wasteful number, since it uses less digits than its factorization.

728914666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15845996.

The product of its digits is 870912, while the sum is 49.

The square root of 728914666 is about 26998.4196944932. The cubic root of 728914666 is about 899.9648817573.

The spelling of 728914666 in words is "seven hundred twenty-eight million, nine hundred fourteen thousand, six hundred sixty-six".