27982421 has 8 divisors (see below), whose sum is σ = 30736320. Its totient is φ = 25356672.

The previous prime is 27982403. The next prime is 27982447. The reversal of 27982421 is 12428972.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 27982421 - 2¹⁰ = 27981397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27982021) 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, 31580 + ... + 32453.

It is an arithmetic number, because the mean of its divisors is an integer number (3842040).

Almost surely, 2^27982421 is an apocalyptic number.

It is an amenable number.

27982421 is a deficient number, since it is larger than the sum of its proper divisors (2753899).

27982421 is a wasteful number, since it uses less digits than its factorization.

27982421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64075.

The product of its digits is 16128, while the sum is 35.

The square root of 27982421 is about 5289.8413019674. The cubic root of 27982421 is about 303.5953360298.

The spelling of 27982421 in words is "twenty-seven million, nine hundred eighty-two thousand, four hundred twenty-one".