728406266 has 24 divisors (see below), whose sum is σ = 1275731136. Its totient is φ = 311010840.

The previous prime is 728406241. The next prime is 728406269. The reversal of 728406266 is 662604827.

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (728406269) 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 11 ways as a sum of consecutive naturals, for example, 12845 + ... + 40271.

It is an arithmetic number, because the mean of its divisors is an integer number (53155464).

Almost surely, 2^728406266 is an apocalyptic number.

728406266 is a deficient number, since it is larger than the sum of its proper divisors (547324870).

728406266 is a wasteful number, since it uses less digits than its factorization.

728406266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27714 (or 27707 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 41.

The square root of 728406266 is about 26989.0026862795. The cubic root of 728406266 is about 899.7555986577.

The spelling of 728406266 in words is "seven hundred twenty-eight million, four hundred six thousand, two hundred sixty-six".