728458622 has 8 divisors (see below), whose sum is σ = 1140196176. Its totient is φ = 348393232.

The previous prime is 728458609. The next prime is 728458631. The reversal of 728458622 is 226854827.

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

It is a super-4 number, since 4×728458622⁴ (a number of 37 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7917983 + ... + 7918074.

It is an arithmetic number, because the mean of its divisors is an integer number (142524522).

Almost surely, 2^728458622 is an apocalyptic number.

728458622 is a deficient number, since it is larger than the sum of its proper divisors (411737554).

728458622 is a wasteful number, since it uses less digits than its factorization.

728458622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15836082.

The product of its digits is 430080, while the sum is 44.

The square root of 728458622 is about 26989.9726194748. The cubic root of 728458622 is about 899.7771555267. Note that the first 3 decimals are identical.

The spelling of 728458622 in words is "seven hundred twenty-eight million, four hundred fifty-eight thousand, six hundred twenty-two".