4080040 has 16 divisors (see below), whose sum is σ = 9180180. Its totient is φ = 1632000.

The previous prime is 4080029. The next prime is 4080047. The reversal of 4080040 is 400804.

It can be written as a sum of positive squares in 2 ways, for example, as 3587236 + 492804 = 1894^2 + 702^2 .

It is a junction number, because it is equal to n+sod(n) for n = 4079996 and 4080023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4080047) 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, 50961 + ... + 51040.

Almost surely, 2^4080040 is an apocalyptic number.

4080040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4080040 is an abundant number, since it is smaller than the sum of its proper divisors (5100140).

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

4080040 is a wasteful number, since it uses less digits than its factorization.

4080040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102012 (or 102008 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 4080040 is about 2019.9108891236. The cubic root of 4080040 is about 159.7919170015.

Adding to 4080040 its reverse (400804), we get a palindrome (4480844).

The spelling of 4080040 in words is "four million, eighty thousand, forty".