172680912 has 120 divisors (see below), whose sum is σ = 505110528. Its totient is φ = 55008000.

The previous prime is 172680901. The next prime is 172680953. The reversal of 172680912 is 219086271.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 450673 + ... + 451055.

Almost surely, 2^172680912 is an apocalyptic number.

172680912 is a gapful number since it is divisible by the number (12) 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 172680912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (252555264).

172680912 is an abundant number, since it is smaller than the sum of its proper divisors (332429616).

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

172680912 is a wasteful number, since it uses less digits than its factorization.

172680912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 529 (or 520 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The square root of 172680912 is about 13140.8109338808. The cubic root of 172680912 is about 556.8626774964.

The spelling of 172680912 in words is "one hundred seventy-two million, six hundred eighty thousand, nine hundred twelve".