172236240 has 240 divisors, whose sum is σ = 653083200. Its totient is φ = 41690880.

The previous prime is 172236157. The next prime is 172236269. The reversal of 172236240 is 42632271.

172236240 is a `hidden beast` number, since 17 + 2 + 23 + 624 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (240).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

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 47 ways as a sum of consecutive naturals, for example, 261031 + ... + 261689.

It is an arithmetic number, because the mean of its divisors is an integer number (2721180).

Almost surely, 2^172236240 is an apocalyptic number.

172236240 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 172236240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (326541600).

172236240 is an abundant number, since it is smaller than the sum of its proper divisors (480846960).

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

172236240 is a wasteful number, since it uses less digits than its factorization.

172236240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 703 (or 680 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 172236240 is about 13123.8805236866. The cubic root of 172236240 is about 556.3842727657.

The spelling of 172236240 in words is "one hundred seventy-two million, two hundred thirty-six thousand, two hundred forty".