1980036 has 18 divisors (see below), whose sum is σ = 5005182. Its totient is φ = 660000.

The previous prime is 1980031. The next prime is 1980053. The reversal of 1980036 is 6300891.

It can be written as a sum of positive squares in only one way, i.e., 1115136 + 864900 = 1056^2 + 930^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×1980036² = 7841085122592, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1979991 and 1980009.

It is not an unprimeable number, because it can be changed into a prime (1980031) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 27465 + ... + 27536.

2^1980036 is an apocalyptic number.

It is an amenable number.

1980036 is an abundant number, since it is smaller than the sum of its proper divisors (3025146).

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

1980036 is a wasteful number, since it uses less digits than its factorization.

1980036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55011 (or 55006 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 1980036 is about 1407.1375199319. The cubic root of 1980036 is about 125.5714845945.

The spelling of 1980036 in words is "one million, nine hundred eighty thousand, thirty-six".