1980423 has 16 divisors (see below), whose sum is σ = 3007200. Its totient is φ = 1287360.

The previous prime is 1980413. The next prime is 1980431. The reversal of 1980423 is 3240891.

It is not a de Polignac number, because 1980423 - 2⁹ = 1979911 is a prime.

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

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1980413) 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, 213 + ... + 2001.

It is an arithmetic number, because the mean of its divisors is an integer number (187950).

2^1980423 is an apocalyptic number.

1980423 is a deficient number, since it is larger than the sum of its proper divisors (1026777).

1980423 is a wasteful number, since it uses less digits than its factorization.

1980423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1839 (or 1833 counting only the distinct ones).

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

The square root of 1980423 is about 1407.2750264252. The cubic root of 1980423 is about 125.5796650853.

The spelling of 1980423 in words is "one million, nine hundred eighty thousand, four hundred twenty-three".