1980424 has 8 divisors (see below), whose sum is σ = 3713310. Its totient is φ = 990208.

The previous prime is 1980413. The next prime is 1980431. The reversal of 1980424 is 4240891.

It can be written as a sum of positive squares in only one way, i.e., 1368900 + 611524 = 1170^2 + 782^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a plaindrome in base 7.

It is a zygodrome in base 7.

It is a junction number, because it is equal to n+sod(n) for n = 1980392 and 1980401.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 123769 + ... + 123784.

2^1980424 is an apocalyptic number.

It is an amenable number.

1980424 is a deficient number, since it is larger than the sum of its proper divisors (1732886).

1980424 is a wasteful number, since it uses less digits than its factorization.

1980424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247559 (or 247555 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 1980424 is about 1407.2753817217. The cubic root of 1980424 is about 125.5796862221.

The spelling of 1980424 in words is "one million, nine hundred eighty thousand, four hundred twenty-four".