723402 has 12 divisors (see below), whose sum is σ = 1567410. Its totient is φ = 241128.

The previous prime is 723391. The next prime is 723407. The reversal of 723402 is 204327.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 720801 + 2601 = 849^2 + 51^2 .

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 40189 = 723402 / (7 + 2 + 3 + 4 + 0 + 2).

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (723407) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 20077 + ... + 20112.

2⁷²³⁴⁰² is an apocalyptic number.

723402 is an abundant number, since it is smaller than the sum of its proper divisors (844008).

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

723402 is a wasteful number, since it uses less digits than its factorization.

723402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40197 (or 40194 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 18.

The square root of 723402 is about 850.5304227363. The cubic root of 723402 is about 89.7690374288.

Adding to 723402 its reverse (204327), we get a palindrome (927729).

It can be divided in two parts, 7 and 23402, that added together give a square (23409 = 153²).

The spelling of 723402 in words is "seven hundred twenty-three thousand, four hundred two", and thus it is an iban number.