172490840 has 64 divisors (see below), whose sum is σ = 425152800. Its totient is φ = 62691328.

The previous prime is 172490839. The next prime is 172490867. The reversal of 172490840 is 48094271.

172490840 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 172490840.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15347 + ... + 24093.

Almost surely, 2^172490840 is an apocalyptic number.

172490840 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 172490840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (212576400).

172490840 is an abundant number, since it is smaller than the sum of its proper divisors (252661960).

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

172490840 is a wasteful number, since it uses less digits than its factorization.

172490840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8804 (or 8800 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 172490840 is about 13133.5768166939. The cubic root of 172490840 is about 556.6582872910.

The spelling of 172490840 in words is "one hundred seventy-two million, four hundred ninety thousand, eight hundred forty".