172673280 has 216 divisors, whose sum is σ = 643945848. Its totient is φ = 42467328.

The previous prime is 172673257. The next prime is 172673287. The reversal of 172673280 is 82376271.

It can be written as a sum of positive squares in 4 ways, for example, as 13307904 + 159365376 = 3648^2 + 12624^2 .

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

It is not an unprimeable number, because it can be changed into a prime (172673287) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 149184 + ... + 150336.

Almost surely, 2^172673280 is an apocalyptic number.

172673280 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 172673280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (321972924).

172673280 is an abundant number, since it is smaller than the sum of its proper divisors (471272568).

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

172673280 is a wasteful number, since it uses less digits than its factorization.

172673280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1193 (or 1176 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 36.

The square root of 172673280 is about 13140.5205376347. The cubic root of 172673280 is about 556.8544734656.

The spelling of 172673280 in words is "one hundred seventy-two million, six hundred seventy-three thousand, two hundred eighty".