32440172212 has 72 divisors (see below), whose sum is σ = 67523543360. Its totient is φ = 13357854720.

The previous prime is 32440172209. The next prime is 32440172221. The reversal of 32440172212 is 21227104423.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4965364 + ... + 4971892.

Almost surely, 2^32440172212 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 32440172212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33761771680).

32440172212 is an abundant number, since it is smaller than the sum of its proper divisors (35083371148).

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

32440172212 is a wasteful number, since it uses less digits than its factorization.

32440172212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6809 (or 6778 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 28.

Adding to 32440172212 its reverse (21227104423), we get a palindrome (53667276635).

The spelling of 32440172212 in words is "thirty-two billion, four hundred forty million, one hundred seventy-two thousand, two hundred twelve".