1986786 has 24 divisors (see below), whose sum is σ = 4492800. Its totient is φ = 633336.

The previous prime is 1986781. The next prime is 1986797. The reversal of 1986786 is 6876891.

It is a happy number.

It is a plaindrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (1986781) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1986 + ... + 2813.

It is an arithmetic number, because the mean of its divisors is an integer number (187200).

2^1986786 is an apocalyptic number.

1986786 is an abundant number, since it is smaller than the sum of its proper divisors (2506014).

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

1986786 is a wasteful number, since it uses less digits than its factorization.

1986786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4830 (or 4827 counting only the distinct ones).

The product of its digits is 145152, while the sum is 45.

The square root of 1986786 is about 1409.5339655361. The cubic root of 1986786 is about 125.7140150279.

It can be divided in two parts, 1986 and 786, that added together give a palindrome (2772).

The spelling of 1986786 in words is "one million, nine hundred eighty-six thousand, seven hundred eighty-six".