40520440 has 32 divisors (see below), whose sum is σ = 91622160. Its totient is φ = 16128000.

The previous prime is 40520437. The next prime is 40520449. The reversal of 40520440 is 4402504.

40520440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40520449) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 6040 + ... + 10840.

Almost surely, 2^40520440 is an apocalyptic number.

40520440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40520440 is an abundant number, since it is smaller than the sum of its proper divisors (51101720).

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

40520440 is a wasteful number, since it uses less digits than its factorization.

40520440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5023 (or 5019 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 19.

The square root of 40520440 is about 6365.5667461743. The cubic root of 40520440 is about 343.4720357882.

Adding to 40520440 its reverse (4402504), we get a palindrome (44922944).

The spelling of 40520440 in words is "forty million, five hundred twenty thousand, four hundred forty".