40020404032 has 28 divisors (see below), whose sum is σ = 90760560160. Its totient is φ = 17151601536.

The previous prime is 40020404003. The next prime is 40020404033. The reversal of 40020404032 is 23040402004.

It is a tau number, because it is divible by the number of its divisors (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40020404033) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44665182 + ... + 44666077.

Almost surely, 2^40020404032 is an apocalyptic number.

It is an amenable number.

40020404032 is an abundant number, since it is smaller than the sum of its proper divisors (50740156128).

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

40020404032 is an equidigital number, since it uses as much as digits as its factorization.

40020404032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89331278 (or 89331268 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 19.

Adding to 40020404032 its reverse (23040402004), we get a palindrome (63060806036).

The spelling of 40020404032 in words is "forty billion, twenty million, four hundred four thousand, thirty-two".