723637672 has 8 divisors (see below), whose sum is σ = 1356820650. Its totient is φ = 361818832.

The previous prime is 723637643. The next prime is 723637679. The reversal of 723637672 is 276736327.

It can be written as a sum of positive squares in only one way, i.e., 672572356 + 51065316 = 25934^2 + 7146^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (723637679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45227347 + ... + 45227362.

Almost surely, 2^723637672 is an apocalyptic number.

It is an amenable number.

723637672 is a deficient number, since it is larger than the sum of its proper divisors (633182978).

723637672 is a wasteful number, since it uses less digits than its factorization.

723637672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90454715 (or 90454711 counting only the distinct ones).

The product of its digits is 444528, while the sum is 43.

The square root of 723637672 is about 26900.5143445251. The cubic root of 723637672 is about 897.7878477605.

The spelling of 723637672 in words is "seven hundred twenty-three million, six hundred thirty-seven thousand, six hundred seventy-two".