2140404 has 48 divisors (see below), whose sum is σ = 5795328. Its totient is φ = 602208.

The previous prime is 2140399. The next prime is 2140421. The reversal of 2140404 is 4040412.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6819 + ... + 7125.

It is an arithmetic number, because the mean of its divisors is an integer number (120736).

2^2140404 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 2140404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2897664).

2140404 is an abundant number, since it is smaller than the sum of its proper divisors (3654924).

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

2140404 is a wasteful number, since it uses less digits than its factorization.

2140404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 404 (or 402 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 15.

The square root of 2140404 is about 1463.0119616736. The cubic root of 2140404 is about 128.8739830607.

Adding to 2140404 its reverse (4040412), we get a palindrome (6180816).

The spelling of 2140404 in words is "two million, one hundred forty thousand, four hundred four".