27972782 has 4 divisors (see below), whose sum is σ = 41959176. Its totient is φ = 13986390.

The previous prime is 27972781. The next prime is 27972809. The reversal of 27972782 is 28727972.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27972781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6993194 + ... + 6993197.

It is an arithmetic number, because the mean of its divisors is an integer number (10489794).

Almost surely, 2^27972782 is an apocalyptic number.

27972782 is a deficient number, since it is larger than the sum of its proper divisors (13986394).

27972782 is a wasteful number, since it uses less digits than its factorization.

27972782 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13986393.

The product of its digits is 197568, while the sum is 44.

The square root of 27972782 is about 5288.9301375609. The cubic root of 27972782 is about 303.5604725761.

The spelling of 27972782 in words is "twenty-seven million, nine hundred seventy-two thousand, seven hundred eighty-two".