722636345 has 8 divisors (see below), whose sum is σ = 867883464. Its totient is φ = 577629184.

The previous prime is 722636281. The next prime is 722636347. The reversal of 722636345 is 543636227.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 316969 + 722319376 = 563^2 + 26876^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 722636345 - 2⁶ = 722636281 is a prime.

It is a super-2 number, since 2×722636345² = 1044406574229918050, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 722636299 and 722636308.

It is not an unprimeable number, because it can be changed into a prime (722636347) 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, 53294 + ... + 65463.

It is an arithmetic number, because the mean of its divisors is an integer number (108485433).

Almost surely, 2^722636345 is an apocalyptic number.

It is an amenable number.

722636345 is a deficient number, since it is larger than the sum of its proper divisors (145247119).

722636345 is a wasteful number, since it uses less digits than its factorization.

722636345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119979.

The product of its digits is 181440, while the sum is 38.

The square root of 722636345 is about 26881.8962314789. The cubic root of 722636345 is about 897.3735547068.

The spelling of 722636345 in words is "seven hundred twenty-two million, six hundred thirty-six thousand, three hundred forty-five".