172440000 has 210 divisors, whose sum is σ = 618926880. Its totient is φ = 45888000.

The previous prime is 172439989. The next prime is 172440013. The reversal of 172440000 is 44271.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 359761 + ... + 360239.

Almost surely, 2^172440000 is an apocalyptic number.

172440000 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 172440000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (309463440).

172440000 is an abundant number, since it is smaller than the sum of its proper divisors (446486880).

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

172440000 is an equidigital number, since it uses as much as digits as its factorization.

172440000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 517 (or 489 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 18.

The square root of 172440000 is about 13131.6411769436. The cubic root of 172440000 is about 556.6035920423.

Adding to 172440000 its reverse (44271), we get a palindrome (172484271).

The spelling of 172440000 in words is "one hundred seventy-two million, four hundred forty thousand".