404040540 has 96 divisors (see below), whose sum is σ = 1191407616. Its totient is φ = 102108160.

The previous prime is 404040503. The next prime is 404040587. The reversal of 404040540 is 45040404.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 154645 + ... + 157235.

It is an arithmetic number, because the mean of its divisors is an integer number (12410496).

Almost surely, 2^404040540 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 404040540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (595703808).

404040540 is an abundant number, since it is smaller than the sum of its proper divisors (787367076).

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

404040540 is a wasteful number, since it uses less digits than its factorization.

404040540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2739 (or 2737 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 21.

The square root of 404040540 is about 20100.7596871362. The cubic root of 404040540 is about 739.2789055427.

Adding to 404040540 its reverse (45040404), we get a palindrome (449080944).

The spelling of 404040540 in words is "four hundred four million, forty thousand, five hundred forty".