40544040 has 32 divisors (see below), whose sum is σ = 121632480. Its totient is φ = 10811712.

The previous prime is 40544029. The next prime is 40544041. The reversal of 40544040 is 4044504.

It is a junction number, because it is equal to n+sod(n) for n = 40543998 and 40544016.

It is not an unprimeable number, because it can be changed into a prime (40544041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 168814 + ... + 169053.

It is an arithmetic number, because the mean of its divisors is an integer number (3801015).

Almost surely, 2^40544040 is an apocalyptic number.

40544040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40544040 is an abundant number, since it is smaller than the sum of its proper divisors (81088440).

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

40544040 is a wasteful number, since it uses less digits than its factorization.

40544040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337881 (or 337877 counting only the distinct ones).

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

The square root of 40544040 is about 6367.4201997355. The cubic root of 40544040 is about 343.5387047488.

Adding to 40544040 its reverse (4044504), we get a palindrome (44588544).

The spelling of 40544040 in words is "forty million, five hundred forty-four thousand, forty".