722778447 has 8 divisors (see below), whose sum is σ = 979503280. Its totient is φ = 473952960.

The previous prime is 722778403. The next prime is 722778467. The reversal of 722778447 is 744877227.

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

It is not a de Polignac number, because 722778447 - 2⁸ = 722778191 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 722778396 and 722778405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (722778467) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1974622 + ... + 1974987.

It is an arithmetic number, because the mean of its divisors is an integer number (122437910).

Almost surely, 2^722778447 is an apocalyptic number.

722778447 is a deficient number, since it is larger than the sum of its proper divisors (256724833).

722778447 is a wasteful number, since it uses less digits than its factorization.

722778447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3949673.

The product of its digits is 1229312, while the sum is 48.

The square root of 722778447 is about 26884.5391814701. The cubic root of 722778447 is about 897.4323718514.

The spelling of 722778447 in words is "seven hundred twenty-two million, seven hundred seventy-eight thousand, four hundred forty-seven".