723420 has 36 divisors (see below), whose sum is σ = 2194920. Its totient is φ = 192864.

The previous prime is 723413. The next prime is 723421. The reversal of 723420 is 24327.

It is a happy number.

723420 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 723393 and 723402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (723421) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1830 + ... + 2189.

It is an arithmetic number, because the mean of its divisors is an integer number (60970).

2⁷²³⁴²⁰ is an apocalyptic number.

It is an amenable number.

723420 is an abundant number, since it is smaller than the sum of its proper divisors (1471500).

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

723420 is a wasteful number, since it uses less digits than its factorization.

723420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4034 (or 4029 counting only the distinct ones).

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

The square root of 723420 is about 850.5410043026. The cubic root of 723420 is about 89.7697819799.

Adding to 723420 its reverse (24327), we get a palindrome (747747).

The spelling of 723420 in words is "seven hundred twenty-three thousand, four hundred twenty", and thus it is an iban number.