172297280 has 56 divisors (see below), whose sum is σ = 412577280. Its totient is φ = 68533760.

The previous prime is 172297277. The next prime is 172297283. The reversal of 172297280 is 82792271.

It is an interprime number because it is at equal distance from previous prime (172297277) and next prime (172297283).

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (172297283) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59711 + ... + 62529.

Almost surely, 2^172297280 is an apocalyptic number.

172297280 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 172297280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (206288640).

172297280 is an abundant number, since it is smaller than the sum of its proper divisors (240280000).

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

172297280 is a wasteful number, since it uses less digits than its factorization.

172297280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3027 (or 3017 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 38.

The square root of 172297280 is about 13126.2058493687. The cubic root of 172297280 is about 556.4499919679.

The spelling of 172297280 in words is "one hundred seventy-two million, two hundred ninety-seven thousand, two hundred eighty".