2104640 has 28 divisors (see below), whose sum is σ = 5012436. Its totient is φ = 841728.

The previous prime is 2104633. The next prime is 2104643. The reversal of 2104640 is 464012.

It can be written as a sum of positive squares in 2 ways, for example, as 1597696 + 506944 = 1264^2 + 712^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2104643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2969 + ... + 3608.

2^2104640 is an apocalyptic number.

2104640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2104640 is an abundant number, since it is smaller than the sum of its proper divisors (2907796).

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

2104640 is an equidigital number, since it uses as much as digits as its factorization.

2104640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6594 (or 6584 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 2104640 is about 1450.7377433568. The cubic root of 2104640 is about 128.1521627915.

Adding to 2104640 its reverse (464012), we get a palindrome (2568652).

It can be divided in two parts, 2104 and 640, that added together give a cube (2744 = 14³).

The spelling of 2104640 in words is "two million, one hundred four thousand, six hundred forty".