40465840 has 20 divisors (see below), whose sum is σ = 94083264. Its totient is φ = 16186304.

The previous prime is 40465837. The next prime is 40465849. The reversal of 40465840 is 4856404.

40465840 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (40465849) 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 3 ways as a sum of consecutive naturals, for example, 252832 + ... + 252991.

Almost surely, 2^40465840 is an apocalyptic number.

40465840 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40465840 is an abundant number, since it is smaller than the sum of its proper divisors (53617424).

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

40465840 is a wasteful number, since it uses less digits than its factorization.

40465840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 505836 (or 505830 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 31.

The square root of 40465840 is about 6361.2766014378. The cubic root of 40465840 is about 343.3176939075.

The spelling of 40465840 in words is "forty million, four hundred sixty-five thousand, eight hundred forty".