27243920 has 80 divisors (see below), whose sum is σ = 70120512. Its totient is φ = 9761280.

The previous prime is 27243919. The next prime is 27243943. The reversal of 27243920 is 2934272.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

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, 72854 + ... + 73226.

Almost surely, 2^27243920 is an apocalyptic number.

27243920 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 27243920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35060256).

27243920 is an abundant number, since it is smaller than the sum of its proper divisors (42876592).

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

27243920 is a wasteful number, since it uses less digits than its factorization.

27243920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 480 (or 474 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 27243920 is about 5219.5708635864. The cubic root of 27243920 is about 300.9007004965.

The spelling of 27243920 in words is "twenty-seven million, two hundred forty-three thousand, nine hundred twenty".