172000026 has 96 divisors (see below), whose sum is σ = 428613120. Its totient is φ = 49341600.

The previous prime is 172000021. The next prime is 172000057. The reversal of 172000026 is 620000271.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 171999972 and 172000008.

It is not an unprimeable number, because it can be changed into a prime (172000021) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 815061 + ... + 815271.

It is an arithmetic number, because the mean of its divisors is an integer number (4464720).

Almost surely, 2^172000026 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 172000026, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (214306560).

172000026 is an abundant number, since it is smaller than the sum of its proper divisors (256613094).

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

172000026 is a wasteful number, since it uses less digits than its factorization.

172000026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 432 (or 429 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 18.

The square root of 172000026 is about 13114.8780398447. The cubic root of 172000026 is about 556.1298046742.

Adding to 172000026 its reverse (620000271), we get a palindrome (792000297).

It can be divided in two parts, 1 and 72000026, that added together give a palindrome (72000027).

The spelling of 172000026 in words is "one hundred seventy-two million, twenty-six", and thus it is an aban number.