2143764 has 72 divisors (see below), whose sum is σ = 6359808. Its totient is φ = 596160.

The previous prime is 2143763. The next prime is 2143793. The reversal of 2143764 is 4673412.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2143763) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11754 + ... + 11934.

2^2143764 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2143764, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3179904).

2143764 is an abundant number, since it is smaller than the sum of its proper divisors (4216044).

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

2143764 is a wasteful number, since it uses less digits than its factorization.

2143764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245 (or 240 counting only the distinct ones).

The product of its digits is 4032, while the sum is 27.

The square root of 2143764 is about 1464.1598273413. The cubic root of 2143764 is about 128.9413831399.

The spelling of 2143764 in words is "two million, one hundred forty-three thousand, seven hundred sixty-four".