27990239 has 6 divisors (see below), whose sum is σ = 28600704. Its totient is φ = 27392540.

The previous prime is 27990199. The next prime is 27990247. The reversal of 27990239 is 93209972.

It is not a de Polignac number, because 27990239 - 2¹² = 27986143 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 27990196 and 27990205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27990269) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4127 + ... + 8544.

It is an arithmetic number, because the mean of its divisors is an integer number (4766784).

Almost surely, 2^27990239 is an apocalyptic number.

27990239 is a deficient number, since it is larger than the sum of its proper divisors (610465).

27990239 is an equidigital number, since it uses as much as digits as its factorization.

27990239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12765 (or 12718 counting only the distinct ones).

The product of its (nonzero) digits is 61236, while the sum is 41.

The square root of 27990239 is about 5290.5802139274. The cubic root of 27990239 is about 303.6236071996.

The spelling of 27990239 in words is "twenty-seven million, nine hundred ninety thousand, two hundred thirty-nine".