1985284 has 24 divisors (see below), whose sum is σ = 4054400. Its totient is φ = 850248.

The previous prime is 1985279. The next prime is 1985287. The reversal of 1985284 is 4825891.

It is not an unprimeable number, because it can be changed into a prime (1985287) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 649 + ... + 2095.

2^1985284 is an apocalyptic number.

1985284 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1985284, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2027200).

1985284 is an abundant number, since it is smaller than the sum of its proper divisors (2069116).

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

1985284 is a wasteful number, since it uses less digits than its factorization.

1985284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1472 (or 1456 counting only the distinct ones).

The product of its digits is 23040, while the sum is 37.

The square root of 1985284 is about 1409.0010645844. The cubic root of 1985284 is about 125.6823273250.

The spelling of 1985284 in words is "one million, nine hundred eighty-five thousand, two hundred eighty-four".