172869660 has 96 divisors (see below), whose sum is σ = 542767680. Its totient is φ = 45674496.

The previous prime is 172869659. The next prime is 172869673. The reversal of 172869660 is 66968271.

It is a Harshad number since it is a multiple of its sum of digits (45).

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, 59604 + ... + 62436.

It is an arithmetic number, because the mean of its divisors is an integer number (5653830).

Almost surely, 2^172869660 is an apocalyptic number.

172869660 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 172869660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (271383840).

172869660 is an abundant number, since it is smaller than the sum of its proper divisors (369898020).

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

172869660 is a wasteful number, since it uses less digits than its factorization.

172869660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2964 (or 2956 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The square root of 172869660 is about 13147.9907210189. The cubic root of 172869660 is about 557.0654955983.

The spelling of 172869660 in words is "one hundred seventy-two million, eight hundred sixty-nine thousand, six hundred sixty".