172491264 has 240 divisors, whose sum is σ = 563026464. Its totient is φ = 50380800.

The previous prime is 172491259. The next prime is 172491281. The reversal of 172491264 is 462194271.

It is a happy number.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2078167 + ... + 2078249.

Almost surely, 2^172491264 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 172491264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (281513232).

172491264 is an abundant number, since it is smaller than the sum of its proper divisors (390535200).

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

172491264 is a wasteful number, since it uses less digits than its factorization.

172491264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159 (or 140 counting only the distinct ones).

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

The square root of 172491264 is about 13133.5929585167. The cubic root of 172491264 is about 556.6587433982.

The spelling of 172491264 in words is "one hundred seventy-two million, four hundred ninety-one thousand, two hundred sixty-four".