172028335880 has 32 divisors (see below), whose sum is σ = 387334747800. Its totient is φ = 68763158016.

The previous prime is 172028335877. The next prime is 172028335891. The reversal of 172028335880 is 88533820271.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 135938215204 + 36090120676 = 368698^2 + 189974^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1447637 + ... + 1561956.

Almost surely, 2^172028335880 is an apocalyptic number.

172028335880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

172028335880 is an abundant number, since it is smaller than the sum of its proper divisors (215306411920).

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

172028335880 is a wasteful number, since it uses less digits than its factorization.

172028335880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3011033 (or 3011029 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 47.

The spelling of 172028335880 in words is "one hundred seventy-two billion, twenty-eight million, three hundred thirty-five thousand, eight hundred eighty".