722620826 has 4 divisors (see below), whose sum is σ = 1083931242. Its totient is φ = 361310412.

The previous prime is 722620807. The next prime is 722620861. The reversal of 722620826 is 628026227.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 628026227 = 73 ⋅8603099.

It can be written as a sum of positive squares in only one way, i.e., 500640625 + 221980201 = 22375^2 + 14899^2 .

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, 180655205 + ... + 180655208.

Almost surely, 2^722620826 is an apocalyptic number.

722620826 is a deficient number, since it is larger than the sum of its proper divisors (361310416).

722620826 is a wasteful number, since it uses less digits than its factorization.

722620826 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 361310415.

The product of its (nonzero) digits is 32256, while the sum is 35.

The square root of 722620826 is about 26881.6075784169. The cubic root of 722620826 is about 897.3671308027.

The spelling of 722620826 in words is "seven hundred twenty-two million, six hundred twenty thousand, eight hundred twenty-six".