1985700 has 36 divisors (see below), whose sum is σ = 5746160. Its totient is φ = 529440.

The previous prime is 1985689. The next prime is 1985713. The reversal of 1985700 is 75891.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3010 + ... + 3609.

2^1985700 is an apocalyptic number.

1985700 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1985700 is an abundant number, since it is smaller than the sum of its proper divisors (3760460).

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

1985700 is a wasteful number, since it uses less digits than its factorization.

1985700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6636 (or 6629 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 30.

The square root of 1985700 is about 1409.1486791677. The cubic root of 1985700 is about 125.6911052794.

The spelling of 1985700 in words is "one million, nine hundred eighty-five thousand, seven hundred".