27620139 has 4 divisors (see below), whose sum is σ = 36826856. Its totient is φ = 18413424.

The previous prime is 27620123. The next prime is 27620141. The reversal of 27620139 is 93102672.

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

It is not a de Polignac number, because 27620139 - 2⁴ = 27620123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27620119) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4603354 + ... + 4603359.

It is an arithmetic number, because the mean of its divisors is an integer number (9206714).

Almost surely, 2^27620139 is an apocalyptic number.

27620139 is a deficient number, since it is larger than the sum of its proper divisors (9206717).

27620139 is an equidigital number, since it uses as much as digits as its factorization.

27620139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9206716.

The product of its (nonzero) digits is 4536, while the sum is 30.

The square root of 27620139 is about 5255.4865616801. The cubic root of 27620139 is about 302.2794476403.

The spelling of 27620139 in words is "twenty-seven million, six hundred twenty thousand, one hundred thirty-nine".