2040040 has 16 divisors (see below), whose sum is σ = 4590180. Its totient is φ = 816000.

The previous prime is 2040029. The next prime is 2040041. The reversal of 2040040 is 400402.

It can be written as a sum of positive squares in 2 ways, for example, as 2022084 + 17956 = 1422^2 + 134^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 2039999 and 2040026.

It is not an unprimeable number, because it can be changed into a prime (2040041) 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, 25461 + ... + 25540.

2^2040040 is an apocalyptic number.

2040040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2040040 is an abundant number, since it is smaller than the sum of its proper divisors (2550140).

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

2040040 is a wasteful number, since it uses less digits than its factorization.

2040040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51012 (or 51008 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 10.

The square root of 2040040 is about 1428.2996884408. The cubic root of 2040040 is about 126.8273430337.

Adding to 2040040 its reverse (400402), we get a palindrome (2440442).

The spelling of 2040040 in words is "two million, forty thousand, forty", and thus it is an eban number.