27971244 has 72 divisors (see below), whose sum is σ = 83819008. Its totient is φ = 7989840.

The previous prime is 27971213. The next prime is 27971263. The reversal of 27971244 is 44217972.

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

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 27971199 and 27971208.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4749 + ... + 8859.

Almost surely, 2^27971244 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 27971244, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41909504).

27971244 is an abundant number, since it is smaller than the sum of its proper divisors (55847764).

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

27971244 is a wasteful number, since it uses less digits than its factorization.

27971244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4137 (or 4123 counting only the distinct ones).

The product of its digits is 28224, while the sum is 36.

The square root of 27971244 is about 5288.7847375366. The cubic root of 27971244 is about 303.5549090184.

The spelling of 27971244 in words is "twenty-seven million, nine hundred seventy-one thousand, two hundred forty-four".