1980426 has 32 divisors (see below), whose sum is σ = 4606848. Its totient is φ = 555840.

The previous prime is 1980413. The next prime is 1980431. The reversal of 1980426 is 6240891.

It is a junction number, because it is equal to n+sod(n) for n = 1980393 and 1980402.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2176 + ... + 2948.

It is an arithmetic number, because the mean of its divisors is an integer number (143964).

2^1980426 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1980426, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2303424).

1980426 is an abundant number, since it is smaller than the sum of its proper divisors (2626422).

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

1980426 is a wasteful number, since it uses less digits than its factorization.

1980426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 846.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 1980426 is about 1407.2760923145. The cubic root of 1980426 is about 125.5797284958.

The spelling of 1980426 in words is "one million, nine hundred eighty thousand, four hundred twenty-six".