27172320 has 96 divisors (see below), whose sum is σ = 97832448. Its totient is φ = 6210048.

The previous prime is 27172297. The next prime is 27172331. The reversal of 27172320 is 2327172.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 684 + ... + 7403.

It is an arithmetic number, because the mean of its divisors is an integer number (1019088).

Almost surely, 2^27172320 is an apocalyptic number.

27172320 is a gapful number since it is divisible by the number (20) 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 27172320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48916224).

27172320 is an abundant number, since it is smaller than the sum of its proper divisors (70660128).

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

27172320 is a wasteful number, since it uses less digits than its factorization.

27172320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8112 (or 8104 counting only the distinct ones).

The product of its (nonzero) digits is 1176, while the sum is 24.

The square root of 27172320 is about 5212.7075498248. The cubic root of 27172320 is about 300.6368692573.

Adding to 27172320 its reverse (2327172), we get a palindrome (29499492).

The spelling of 27172320 in words is "twenty-seven million, one hundred seventy-two thousand, three hundred twenty".