27280138 has 8 divisors (see below), whose sum is σ = 43327332. Its totient is φ = 12837696.

The previous prime is 27280133. The next prime is 27280147. The reversal of 27280138 is 83108272.

It can be written as a sum of positive squares in 2 ways, for example, as 26286129 + 994009 = 5127^2 + 997^2 .

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

It is not an unprimeable number, because it can be changed into a prime (27280133) 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, 401145 + ... + 401212.

Almost surely, 2^27280138 is an apocalyptic number.

27280138 is a deficient number, since it is larger than the sum of its proper divisors (16047194).

27280138 is a wasteful number, since it uses less digits than its factorization.

27280138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 802376.

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 27280138 is about 5223.0391535963. The cubic root of 27280138 is about 301.0339803361.

The spelling of 27280138 in words is "twenty-seven million, two hundred eighty thousand, one hundred thirty-eight".