2102440 has 16 divisors (see below), whose sum is σ = 4730580. Its totient is φ = 840960.

The previous prime is 2102431. The next prime is 2102459. The reversal of 2102440 is 442012.

2102440 is digitally balanced in base 5, 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 2067844 + 34596 = 1438^2 + 186^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2102440.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26241 + ... + 26320.

2^2102440 is an apocalyptic number.

2102440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2102440 is an abundant number, since it is smaller than the sum of its proper divisors (2628140).

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

2102440 is a wasteful number, since it uses less digits than its factorization.

2102440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52572 (or 52568 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 2102440 is about 1449.9793101972. The cubic root of 2102440 is about 128.1074943365.

Adding to 2102440 its reverse (442012), we get a palindrome (2544452).

The spelling of 2102440 in words is "two million, one hundred two thousand, four hundred forty".