27478272 has 72 divisors (see below), whose sum is σ = 75186496. Its totient is φ = 8902656.

The previous prime is 27478271. The next prime is 27478277. The reversal of 27478272 is 27287472.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 27478272.

It is not an unprimeable number, because it can be changed into a prime (27478271) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27933 + ... + 28899.

Almost surely, 2^27478272 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 27478272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37593248).

27478272 is an abundant number, since it is smaller than the sum of its proper divisors (47708224).

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

27478272 is an equidigital number, since it uses as much as digits as its factorization.

27478272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1023 (or 1009 counting only the distinct ones).

The product of its digits is 87808, while the sum is 39.

The square root of 27478272 is about 5241.9721479611. The cubic root of 27478272 is about 301.7610202432.

The spelling of 27478272 in words is "twenty-seven million, four hundred seventy-eight thousand, two hundred seventy-two".