7172280 has 128 divisors (see below), whose sum is σ = 24840000. Its totient is φ = 1838592.

The previous prime is 7172267. The next prime is 7172287. The reversal of 7172280 is 822717.

7172280 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7172287) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 31206 + ... + 31434.

Almost surely, 2^7172280 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 7172280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12420000).

7172280 is an abundant number, since it is smaller than the sum of its proper divisors (17667720).

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

7172280 is a wasteful number, since it uses less digits than its factorization.

7172280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278 (or 268 counting only the distinct ones).

The product of its (nonzero) digits is 1568, while the sum is 27.

The square root of 7172280 is about 2678.1112747606. Note that the first 3 decimals coincide. The cubic root of 7172280 is about 192.8497492756.

Adding to 7172280 its reverse (822717), we get a palindrome (7994997).

The spelling of 7172280 in words is "seven million, one hundred seventy-two thousand, two hundred eighty".