723632 has 60 divisors (see below), whose sum is σ = 1781136. Its totient is φ = 282240.

The previous prime is 723623. The next prime is 723661. The reversal of 723632 is 236327.

It is an Ulam number.

It is an alternating number because its digits alternate between odd and even.

It is a junction number, because it is equal to n+sod(n) for n = 723598 and 723607.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 723632.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10157 + ... + 10227.

2⁷²³⁶³² is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 723632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (890568).

723632 is an abundant number, since it is smaller than the sum of its proper divisors (1057504).

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

723632 is a wasteful number, since it uses less digits than its factorization.

723632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106 (or 93 counting only the distinct ones).

The product of its digits is 1512, while the sum is 23.

The square root of 723632 is about 850.6656217339. The cubic root of 723632 is about 89.7785502081.

Adding to 723632 its reverse (236327), we get a palindrome (959959).

The spelling of 723632 in words is "seven hundred twenty-three thousand, six hundred thirty-two".