728620166 has 8 divisors (see below), whose sum is σ = 1101273624. Its totient is φ = 361528960.

The previous prime is 728620163. The next prime is 728620171. The reversal of 728620166 is 661026827.

It is a happy number.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728620163) by changing a digit.

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, 1390235 + ... + 1390758.

It is an arithmetic number, because the mean of its divisors is an integer number (137659203).

Almost surely, 2^728620166 is an apocalyptic number.

728620166 is a deficient number, since it is larger than the sum of its proper divisors (372653458).

728620166 is a wasteful number, since it uses less digits than its factorization.

728620166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2781126.

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 728620166 is about 26992.9651205643. The cubic root of 728620166 is about 899.8436625564.

The spelling of 728620166 in words is "seven hundred twenty-eight million, six hundred twenty thousand, one hundred sixty-six".