40120824 has 32 divisors (see below), whose sum is σ = 101099520. Its totient is φ = 13267296.

The previous prime is 40120819. The next prime is 40120853. The reversal of 40120824 is 42802104.

It is a self number, because there is not a number n which added to its sum of digits gives 40120824.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3534 + ... + 9629.

It is an arithmetic number, because the mean of its divisors is an integer number (3159360).

Almost surely, 2^40120824 is an apocalyptic number.

It is an amenable number.

40120824 is an abundant number, since it is smaller than the sum of its proper divisors (60978696).

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

40120824 is a wasteful number, since it uses less digits than its factorization.

40120824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13299 (or 13295 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 21.

The square root of 40120824 is about 6334.1000939360. The cubic root of 40120824 is about 342.3391867642.

Adding to 40120824 its reverse (42802104), we get a palindrome (82922928).

The spelling of 40120824 in words is "forty million, one hundred twenty thousand, eight hundred twenty-four".