172398240 has 192 divisors, whose sum is σ = 689713920. Its totient is φ = 39398400.

The previous prime is 172398199. The next prime is 172398253. The reversal of 172398240 is 42893271.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 172398195 and 172398204.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 27390 + ... + 33090.

It is an arithmetic number, because the mean of its divisors is an integer number (3592260).

Almost surely, 2^172398240 is an apocalyptic number.

172398240 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 172398240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (344856960).

172398240 is an abundant number, since it is smaller than the sum of its proper divisors (517315680).

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

172398240 is a wasteful number, since it uses less digits than its factorization.

172398240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5732 (or 5718 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 172398240 is about 13130.0510280806. The cubic root of 172398240 is about 556.5586572967.

The spelling of 172398240 in words is "one hundred seventy-two million, three hundred ninety-eight thousand, two hundred forty".