40809472 has 44 divisors (see below), whose sum is σ = 89019936. Its totient is φ = 18544640.

The previous prime is 40809463. The next prime is 40809487. The reversal of 40809472 is 27490804.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (44).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9453 + ... + 13075.

Almost surely, 2^40809472 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 40809472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44509968).

40809472 is an abundant number, since it is smaller than the sum of its proper divisors (48210464).

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

40809472 is a wasteful number, since it uses less digits than its factorization.

40809472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3654 (or 3636 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 40809472 is about 6388.2291756010. The cubic root of 40809472 is about 344.2867628674.

The spelling of 40809472 in words is "forty million, eight hundred nine thousand, four hundred seventy-two".