722603818 has 4 divisors (see below), whose sum is σ = 1083905730. Its totient is φ = 361301908.

The previous prime is 722603797. The next prime is 722603851. The reversal of 722603818 is 818306227.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 608263569 + 114340249 = 24663^2 + 10693^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 180650953 + ... + 180650956.

Almost surely, 2^722603818 is an apocalyptic number.

722603818 is a deficient number, since it is larger than the sum of its proper divisors (361301912).

722603818 is a wasteful number, since it uses less digits than its factorization.

722603818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 361301911.

The product of its (nonzero) digits is 32256, while the sum is 37.

The square root of 722603818 is about 26881.2912264273. The cubic root of 722603818 is about 897.3600904391.

The spelling of 722603818 in words is "seven hundred twenty-two million, six hundred three thousand, eight hundred eighteen".