1423320 has 64 divisors (see below), whose sum is σ = 4428000. Its totient is φ = 365568.

The previous prime is 1423319. The next prime is 1423321. The reversal of 1423320 is 233241.

It is an interprime number because it is at equal distance from previous prime (1423319) and next prime (1423321).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1423320.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1423321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3276 + ... + 3684.

2^1423320 is an apocalyptic number.

1423320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1423320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2214000).

1423320 is an abundant number, since it is smaller than the sum of its proper divisors (3004680).

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

1423320 is a wasteful number, since it uses less digits than its factorization.

1423320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 452 (or 448 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 1423320 is about 1193.0297565442. The cubic root of 1423320 is about 112.4866156917.

Adding to 1423320 its reverse (233241), we get a palindrome (1656561).

The spelling of 1423320 in words is "one million, four hundred twenty-three thousand, three hundred twenty".