40120443252 has 72 divisors (see below), whose sum is σ = 103818658944. Its totient is φ = 13056857856.

The previous prime is 40120443239. The next prime is 40120443299. The reversal of 40120443252 is 25234402104.

40120443252 is a `hidden beast` number, since 401 + 2 + 0 + 4 + 4 + 3 + 252 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5124613 + ... + 5132435.

Almost surely, 2^40120443252 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 40120443252, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51909329472).

40120443252 is an abundant number, since it is smaller than the sum of its proper divisors (63698215692).

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

40120443252 is a wasteful number, since it uses less digits than its factorization.

40120443252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11189 (or 11184 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 27.

Adding to 40120443252 its reverse (25234402104), we get a palindrome (65354845356).

The spelling of 40120443252 in words is "forty billion, one hundred twenty million, four hundred forty-three thousand, two hundred fifty-two".