1423800 has 144 divisors (see below), whose sum is σ = 5513040. Its totient is φ = 322560.

The previous prime is 1423789. The next prime is 1423819. The reversal of 1423800 is 83241.

It is a happy number.

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

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 12544 + ... + 12656.

It is an arithmetic number, because the mean of its divisors is an integer number (38285).

2^1423800 is an apocalyptic number.

1423800 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 1423800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2756520).

1423800 is an abundant number, since it is smaller than the sum of its proper divisors (4089240).

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

1423800 is a wasteful number, since it uses less digits than its factorization.

1423800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142 (or 130 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 1423800 is about 1193.2309080811. The cubic root of 1423800 is about 112.4992592544.

It can be divided in two parts, 1 and 423800, that added together give a square (423801 = 651²).

The spelling of 1423800 in words is "one million, four hundred twenty-three thousand, eight hundred".