1423980 has 72 divisors (see below), whose sum is σ = 4494672. Its totient is φ = 378432.

The previous prime is 1423979. The next prime is 1423991. The reversal of 1423980 is 893241.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4714 + ... + 5006.

It is an arithmetic number, because the mean of its divisors is an integer number (62426).

2^1423980 is an apocalyptic number.

1423980 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 1423980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2247336).

1423980 is an abundant number, since it is smaller than the sum of its proper divisors (3070692).

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

1423980 is a wasteful number, since it uses less digits than its factorization.

1423980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317 (or 303 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 1423980 is about 1193.3063311656. The cubic root of 1423980 is about 112.5039998578.

The spelling of 1423980 in words is "one million, four hundred twenty-three thousand, nine hundred eighty".