672144322 has 4 divisors (see below), whose sum is σ = 1008216486. Its totient is φ = 336072160.

The previous prime is 672144311. The next prime is 672144329. The reversal of 672144322 is 223441276.

It is a happy number.

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., 509811241 + 162333081 = 22579^2 + 12741^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (672144329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 168036079 + ... + 168036082.

Almost surely, 2^672144322 is an apocalyptic number.

672144322 is a deficient number, since it is larger than the sum of its proper divisors (336072164).

672144322 is a wasteful number, since it uses less digits than its factorization.

672144322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336072163.

The product of its digits is 16128, while the sum is 31.

The square root of 672144322 is about 25925.7463151979. The cubic root of 672144322 is about 875.9665279497.

Adding to 672144322 its reverse (223441276), we get a palindrome (895585598).

The spelling of 672144322 in words is "six hundred seventy-two million, one hundred forty-four thousand, three hundred twenty-two".