32040023440 has 40 divisors (see below), whose sum is σ = 75261042360. Its totient is φ = 12683882496.

The previous prime is 32040023413. The next prime is 32040023441. The reversal of 32040023440 is 4432004023.

It can be written as a sum of positive squares in 4 ways, for example, as 9029560576 + 23010462864 = 95024^2 + 151692^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (32040023441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2056675 + ... + 2072194.

It is an arithmetic number, because the mean of its divisors is an integer number (1881526059).

Almost surely, 2^32040023440 is an apocalyptic number.

It is an amenable number.

32040023440 is an abundant number, since it is smaller than the sum of its proper divisors (43221018920).

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

32040023440 is a wasteful number, since it uses less digits than its factorization.

32040023440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4128979 (or 4128973 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 22.

Adding to 32040023440 its reverse (4432004023), we get a palindrome (36472027463).

The spelling of 32040023440 in words is "thirty-two billion, forty million, twenty-three thousand, four hundred forty".