172195440 has 80 divisors (see below), whose sum is σ = 535361568. Its totient is φ = 45785088.

The previous prime is 172195433. The next prime is 172195481. The reversal of 172195440 is 44591271.

It is a happy number.

172195440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 103092 + ... + 104748.

Almost surely, 2^172195440 is an apocalyptic number.

172195440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 172195440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (267680784).

172195440 is an abundant number, since it is smaller than the sum of its proper divisors (363166128).

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

172195440 is a wasteful number, since it uses less digits than its factorization.

172195440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2106 (or 2100 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 33.

The square root of 172195440 is about 13122.3260133255. The cubic root of 172195440 is about 556.3403364624.

The spelling of 172195440 in words is "one hundred seventy-two million, one hundred ninety-five thousand, four hundred forty".