172012680 has 256 divisors, whose sum is σ = 667814400. Its totient is φ = 38568960.

The previous prime is 172012669. The next prime is 172012693. The reversal of 172012680 is 86210271.

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

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 460974 + ... + 461346.

It is an arithmetic number, because the mean of its divisors is an integer number (2608650).

Almost surely, 2^172012680 is an apocalyptic number.

172012680 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 172012680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (333907200).

172012680 is an abundant number, since it is smaller than the sum of its proper divisors (495801720).

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

172012680 is a wasteful number, since it uses less digits than its factorization.

172012680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 461 (or 451 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 27.

The square root of 172012680 is about 13115.3604601627. The cubic root of 172012680 is about 556.1434424511.

It can be divided in two parts, 17201 and 2680, that added together give a square (19881 = 141²).

The spelling of 172012680 in words is "one hundred seventy-two million, twelve thousand, six hundred eighty".