172841886 has 48 divisors (see below), whose sum is σ = 429945984. Its totient is φ = 49157712.

The previous prime is 172841869. The next prime is 172841887. The reversal of 172841886 is 688148271.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172841887) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25581 + ... + 31623.

It is an arithmetic number, because the mean of its divisors is an integer number (8957208).

Almost surely, 2^172841886 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 172841886, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (214972992).

172841886 is an abundant number, since it is smaller than the sum of its proper divisors (257104098).

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

172841886 is a wasteful number, since it uses less digits than its factorization.

172841886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6285 (or 6282 counting only the distinct ones).

The product of its digits is 172032, while the sum is 45.

The square root of 172841886 is about 13146.9344715793. The cubic root of 172841886 is about 557.0356604695.

The spelling of 172841886 in words is "one hundred seventy-two million, eight hundred forty-one thousand, eight hundred eighty-six".