2120440 has 32 divisors (see below), whose sum is σ = 5453280. Its totient is φ = 726912.

The previous prime is 2120429. The next prime is 2120453. The reversal of 2120440 is 440212.

It is a self number, because there is not a number n which added to its sum of digits gives 2120440.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3507 + ... + 4066.

It is an arithmetic number, because the mean of its divisors is an integer number (170415).

2^2120440 is an apocalyptic number.

2120440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2120440 is an abundant number, since it is smaller than the sum of its proper divisors (3332840).

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

2120440 is a wasteful number, since it uses less digits than its factorization.

2120440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7591 (or 7587 counting only the distinct ones).

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

The square root of 2120440 is about 1456.1730666373. The cubic root of 2120440 is about 128.4720525453.

Adding to 2120440 its reverse (440212), we get a palindrome (2560652).

The spelling of 2120440 in words is "two million, one hundred twenty thousand, four hundred forty".