2186964 has 36 divisors (see below), whose sum is σ = 5954676. Its totient is φ = 672768.

The previous prime is 2186941. The next prime is 2186969. The reversal of 2186964 is 4696812.

2186964 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 1299600 + 887364 = 1140^2 + 942^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2186969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1869 + ... + 2804.

2^2186964 is an apocalyptic number.

It is an amenable number.

2186964 is an abundant number, since it is smaller than the sum of its proper divisors (3767712).

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

2186964 is a wasteful number, since it uses less digits than its factorization.

2186964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4696 (or 4691 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 2186964 is about 1478.8387336015. The cubic root of 2186964 is about 129.8017491017.

It can be divided in two parts, 2 and 186964, that added together give a triangular number (186966 = T₆₁₁).

The spelling of 2186964 in words is "two million, one hundred eighty-six thousand, nine hundred sixty-four".