172389888 has 240 divisors, whose sum is σ = 574516800. Its totient is φ = 49213440.

The previous prime is 172389887. The next prime is 172389913. The reversal of 172389888 is 888983271.

It is a super-4 number, since 4×172389888⁴ (a number of 34 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172389887) 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, 962983 + ... + 963161.

It is an arithmetic number, because the mean of its divisors is an integer number (2393820).

Almost surely, 2^172389888 is an apocalyptic number.

172389888 is a gapful number since it is divisible by the number (18) 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 172389888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (287258400).

172389888 is an abundant number, since it is smaller than the sum of its proper divisors (402126912).

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

172389888 is a wasteful number, since it uses less digits than its factorization.

172389888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233 (or 214 counting only the distinct ones).

The product of its digits is 1548288, while the sum is 54.

The square root of 172389888 is about 13129.7329751979. The cubic root of 172389888 is about 556.5496694768.

The spelling of 172389888 in words is "one hundred seventy-two million, three hundred eighty-nine thousand, eight hundred eighty-eight".