672811722 has 96 divisors (see below), whose sum is σ = 1654720704. Its totient is φ = 195782400.

The previous prime is 672811673. The next prime is 672811747. The reversal of 672811722 is 227118276.

It is a super-2 number, since 2×672811722² = 905351226521210568, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 543288 + ... + 544524.

It is an arithmetic number, because the mean of its divisors is an integer number (17236674).

Almost surely, 2^672811722 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 672811722, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (827360352).

672811722 is an abundant number, since it is smaller than the sum of its proper divisors (981908982).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

672811722 is a wasteful number, since it uses less digits than its factorization.

672811722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1364 (or 1361 counting only the distinct ones).

The product of its digits is 18816, while the sum is 36.

The square root of 672811722 is about 25938.6144965378. The cubic root of 672811722 is about 876.2563598853.

Adding to 672811722 its reverse (227118276), we get a palindrome (899929998).

The spelling of 672811722 in words is "six hundred seventy-two million, eight hundred eleven thousand, seven hundred twenty-two".