27971836 has 6 divisors (see below), whose sum is σ = 48950720. Its totient is φ = 13985916.

The previous prime is 27971821. The next prime is 27971837. The reversal of 27971836 is 63817972.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 27971792 and 27971801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27971837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3496476 + ... + 3496483.

Almost surely, 2^27971836 is an apocalyptic number.

It is an amenable number.

27971836 is a deficient number, since it is larger than the sum of its proper divisors (20978884).

27971836 is a wasteful number, since it uses less digits than its factorization.

27971836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6992963 (or 6992961 counting only the distinct ones).

The product of its digits is 127008, while the sum is 43.

The square root of 27971836 is about 5288.8407047292. The cubic root of 27971836 is about 303.5570505420.

The spelling of 27971836 in words is "twenty-seven million, nine hundred seventy-one thousand, eight hundred thirty-six".