728236722 has 8 divisors (see below), whose sum is σ = 1456473456. Its totient is φ = 242745572.

The previous prime is 728236709. The next prime is 728236783. The reversal of 728236722 is 227632827.

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

728236722 is an admirable 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, 60686388 + ... + 60686399.

It is an arithmetic number, because the mean of its divisors is an integer number (182059182).

Almost surely, 2^728236722 is an apocalyptic number.

728236722 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

728236722 is a wasteful number, since it uses less digits than its factorization.

728236722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121372792.

The product of its digits is 112896, while the sum is 39.

The square root of 728236722 is about 26985.8615204333. The cubic root of 728236722 is about 899.6857841381.

The spelling of 728236722 in words is "seven hundred twenty-eight million, two hundred thirty-six thousand, seven hundred twenty-two".