1985020 has 12 divisors (see below), whose sum is σ = 4168584. Its totient is φ = 794000.

The previous prime is 1985017. The next prime is 1985041. The reversal of 1985020 is 205891.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49606 + ... + 49645.

It is an arithmetic number, because the mean of its divisors is an integer number (347382).

2^1985020 is an apocalyptic number.

1985020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1985020 is an abundant number, since it is smaller than the sum of its proper divisors (2183564).

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

1985020 is a wasteful number, since it uses less digits than its factorization.

1985020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99260 (or 99258 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 25.

The square root of 1985020 is about 1408.9073780771. The cubic root of 1985020 is about 125.6767560642.

The spelling of 1985020 in words is "one million, nine hundred eighty-five thousand, twenty".