2053640 has 16 divisors (see below), whose sum is σ = 4620780. Its totient is φ = 821440.

The previous prime is 2053631. The next prime is 2053643. The reversal of 2053640 is 463502.

It can be written as a sum of positive squares in 2 ways, for example, as 2033476 + 20164 = 1426^2 + 142^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (2053643) 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, 25631 + ... + 25710.

2^2053640 is an apocalyptic number.

2053640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2053640 is an abundant number, since it is smaller than the sum of its proper divisors (2567140).

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

2053640 is a wasteful number, since it uses less digits than its factorization.

2053640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51352 (or 51348 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 2053640 is about 1433.0526857028. The cubic root of 2053640 is about 127.1085520736.

The spelling of 2053640 in words is "two million, fifty-three thousand, six hundred forty".