27198720 has 144 divisors (see below), whose sum is σ = 96640320. Its totient is φ = 7243776.

The previous prime is 27198713. The next prime is 27198763. The reversal of 27198720 is 2789172.

It is a tau number, because it is divible by the number of its divisors (144).

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

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, 34167 + ... + 34953.

Almost surely, 2^27198720 is an apocalyptic number.

27198720 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 27198720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48320160).

27198720 is an abundant number, since it is smaller than the sum of its proper divisors (69441600).

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

27198720 is an equidigital number, since it uses as much as digits as its factorization.

27198720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 817 (or 797 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 36.

The square root of 27198720 is about 5215.2392083202. The cubic root of 27198720 is about 300.7342016938.

The spelling of 27198720 in words is "twenty-seven million, one hundred ninety-eight thousand, seven hundred twenty".