1986764 has 18 divisors (see below), whose sum is σ = 3766140. Its totient is φ = 916656.

The previous prime is 1986757. The next prime is 1986769. The reversal of 1986764 is 4676891.

It is not an unprimeable number, because it can be changed into a prime (1986769) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 794 + ... + 2145.

It is an arithmetic number, because the mean of its divisors is an integer number (209230).

2^1986764 is an apocalyptic number.

It is an amenable number.

1986764 is a deficient number, since it is larger than the sum of its proper divisors (1779376).

1986764 is a wasteful number, since it uses less digits than its factorization.

1986764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2969 (or 2954 counting only the distinct ones).

The product of its digits is 72576, while the sum is 41.

The square root of 1986764 is about 1409.5261615167. The cubic root of 1986764 is about 125.7135510091.

The spelling of 1986764 in words is "one million, nine hundred eighty-six thousand, seven hundred sixty-four".