722574418 has 4 divisors (see below), whose sum is σ = 1083861630. Its totient is φ = 361287208.

The previous prime is 722574401. The next prime is 722574439. The reversal of 722574418 is 814475227.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 814475227 = 79 ⋅10309813.

It can be written as a sum of positive squares in only one way, i.e., 717543369 + 5031049 = 26787^2 + 2243^2 .

It is a super-2 number, since 2×722574418² = 1044227579096077448, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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, 180643603 + ... + 180643606.

Almost surely, 2^722574418 is an apocalyptic number.

722574418 is a deficient number, since it is larger than the sum of its proper divisors (361287212).

722574418 is a wasteful number, since it uses less digits than its factorization.

722574418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 361287211.

The product of its digits is 125440, while the sum is 40.

The square root of 722574418 is about 26880.7443721337. The cubic root of 722574418 is about 897.3479202182.

The spelling of 722574418 in words is "seven hundred twenty-two million, five hundred seventy-four thousand, four hundred eighteen".