722750018 has 4 divisors (see below), whose sum is σ = 1084125030. Its totient is φ = 361375008.

The previous prime is 722749961. The next prime is 722750023. The reversal of 722750018 is 810057227.

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., 398281849 + 324468169 = 19957^2 + 18013^2 .

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 180687503 + ... + 180687506.

Almost surely, 2^722750018 is an apocalyptic number.

722750018 is a deficient number, since it is larger than the sum of its proper divisors (361375012).

722750018 is a wasteful number, since it uses less digits than its factorization.

722750018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 361375011.

The product of its (nonzero) digits is 7840, while the sum is 32.

The square root of 722750018 is about 26884.0104523116. The cubic root of 722750018 is about 897.4206054798.

The spelling of 722750018 in words is "seven hundred twenty-two million, seven hundred fifty thousand, eighteen".