172229040 has 120 divisors (see below), whose sum is σ = 612469728. Its totient is φ = 43223040.

The previous prime is 172229039. The next prime is 172229041. The reversal of 172229040 is 40922271.

It is an interprime number because it is at equal distance from previous prime (172229039) and next prime (172229041).

It is a tau number, because it is divible by the number of its divisors (120).

It is a junction number, because it is equal to n+sod(n) for n = 172228995 and 172229013.

It is not an unprimeable number, because it can be changed into a prime (172229041) 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, 5205 + ... + 19275.

Almost surely, 2^172229040 is an apocalyptic number.

172229040 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 172229040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (306234864).

172229040 is an abundant number, since it is smaller than the sum of its proper divisors (440240688).

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

172229040 is a wasteful number, since it uses less digits than its factorization.

172229040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14107 (or 14098 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 172229040 is about 13123.6062117087. The cubic root of 172229040 is about 556.3765198047.

It can be divided in two parts, 17222 and 9040, that added together give a palindrome (26262).

The spelling of 172229040 in words is "one hundred seventy-two million, two hundred twenty-nine thousand, forty".