1423920 has 80 divisors (see below), whose sum is σ = 4687200. Its totient is φ = 356352.

The previous prime is 1423909. The next prime is 1423921. The reversal of 1423920 is 293241.

It is a tau number, because it is divible by the number of its divisors (80).

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1423921) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3906 + ... + 4254.

It is an arithmetic number, because the mean of its divisors is an integer number (58590).

2^1423920 is an apocalyptic number.

1423920 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 1423920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2343600).

1423920 is an abundant number, since it is smaller than the sum of its proper divisors (3263280).

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

1423920 is a wasteful number, since it uses less digits than its factorization.

1423920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 382 (or 376 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 1423920 is about 1193.2811906671. The cubic root of 1423920 is about 112.5024197010.

The spelling of 1423920 in words is "one million, four hundred twenty-three thousand, nine hundred twenty".