172471680 has 192 divisors, whose sum is σ = 618181200. Its totient is φ = 45950976.

The previous prime is 172471661. The next prime is 172471751. The reversal of 172471680 is 86174271.

It is a tau number, because it is divible by the number of its divisors (192).

It is a Harshad number since it is a multiple of its sum of digits (36).

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, 154966 + ... + 156074.

Almost surely, 2^172471680 is an apocalyptic number.

172471680 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 172471680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (309090600).

172471680 is an abundant number, since it is smaller than the sum of its proper divisors (445709520).

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

172471680 is an equidigital number, since it uses as much as digits as its factorization.

172471680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1143 (or 1119 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 36.

The square root of 172471680 is about 13132.8473683356. The cubic root of 172471680 is about 556.6376756309.

The spelling of 172471680 in words is "one hundred seventy-two million, four hundred seventy-one thousand, six hundred eighty".