1986285 has 16 divisors (see below), whose sum is σ = 3632256. Its totient is φ = 907968.

The previous prime is 1986277. The next prime is 1986289. The reversal of 1986285 is 5826891.

It is not a de Polignac number, because 1986285 - 2³ = 1986277 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1986289) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9354 + ... + 9563.

It is an arithmetic number, because the mean of its divisors is an integer number (227016).

2^1986285 is an apocalyptic number.

1986285 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1986285 is a deficient number, since it is larger than the sum of its proper divisors (1645971).

1986285 is a wasteful number, since it uses less digits than its factorization.

1986285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18932.

The product of its digits is 34560, while the sum is 39.

The square root of 1986285 is about 1409.3562360170. The cubic root of 1986285 is about 125.7034472036.

Subtracting 1986285 from its reverse (5826891), we obtain a triangular number (3840606 = T₂₇₇₁).

The spelling of 1986285 in words is "one million, nine hundred eighty-six thousand, two hundred eighty-five".