2105440 has 24 divisors (see below), whose sum is σ = 4974480. Its totient is φ = 842112.

The previous prime is 2105431. The next prime is 2105449. The reversal of 2105440 is 445012.

It is an interprime number because it is at equal distance from previous prime (2105431) and next prime (2105449).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2105449) 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, 6420 + ... + 6739.

It is an arithmetic number, because the mean of its divisors is an integer number (207270).

2^2105440 is an apocalyptic number.

2105440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2105440 is an abundant number, since it is smaller than the sum of its proper divisors (2869040).

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

2105440 is a wasteful number, since it uses less digits than its factorization.

2105440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13174 (or 13166 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 2105440 is about 1451.0134389453. The cubic root of 2105440 is about 128.1683981481.

The spelling of 2105440 in words is "two million, one hundred five thousand, four hundred forty".