27198972 has 72 divisors (see below), whose sum is σ = 72648576. Its totient is φ = 8563104.

The previous prime is 27198971. The next prime is 27198991. The reversal of 27198972 is 27989172.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27198971) 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, 88443 + ... + 88749.

It is an arithmetic number, because the mean of its divisors is an integer number (1009008).

Almost surely, 2^27198972 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 27198972, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36324288).

27198972 is an abundant number, since it is smaller than the sum of its proper divisors (45449604).

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

27198972 is a wasteful number, since it uses less digits than its factorization.

27198972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 447 (or 442 counting only the distinct ones).

The product of its digits is 127008, while the sum is 45.

The square root of 27198972 is about 5215.2633682298. The cubic root of 27198972 is about 300.7351304726.

The spelling of 27198972 in words is "twenty-seven million, one hundred ninety-eight thousand, nine hundred seventy-two".