27994971 has 16 divisors (see below), whose sum is σ = 40271904. Its totient is φ = 17232384.

The previous prime is 27994957. The next prime is 27994973. The reversal of 27994971 is 17949972.

It is a happy number.

It is not a de Polignac number, because 27994971 - 2¹⁰ = 27993947 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 27994971.

It is not an unprimeable number, because it can be changed into a prime (27994973) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2476 + ... + 7881.

It is an arithmetic number, because the mean of its divisors is an integer number (2516994).

Almost surely, 2^27994971 is an apocalyptic number.

27994971 is a deficient number, since it is larger than the sum of its proper divisors (12276933).

27994971 is a wasteful number, since it uses less digits than its factorization.

27994971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10430.

The product of its digits is 285768, while the sum is 48.

The square root of 27994971 is about 5291.0274049564. The cubic root of 27994971 is about 303.6407163301.

The spelling of 27994971 in words is "twenty-seven million, nine hundred ninety-four thousand, nine hundred seventy-one".