172885440 has 224 divisors, whose sum is σ = 675924480. Its totient is φ = 36458496.

The previous prime is 172885421. The next prime is 172885451. The reversal of 172885440 is 44588271.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (224).

It is a super-3 number, since 3×172885440³ (a number of 26 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 86371 + ... + 88349.

It is an arithmetic number, because the mean of its divisors is an integer number (3017520).

Almost surely, 2^172885440 is an apocalyptic number.

172885440 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 172885440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (337962240).

172885440 is an abundant number, since it is smaller than the sum of its proper divisors (503039040).

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

172885440 is a wasteful number, since it uses less digits than its factorization.

172885440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2019 (or 2009 counting only the distinct ones).

The product of its (nonzero) digits is 71680, while the sum is 39.

The square root of 172885440 is about 13148.5907990172. The cubic root of 172885440 is about 557.0824452201.

The spelling of 172885440 in words is "one hundred seventy-two million, eight hundred eighty-five thousand, four hundred forty".