274778138 has 4 divisors (see below), whose sum is σ = 412167210. Its totient is φ = 137389068.

The previous prime is 274778117. The next prime is 274778143. The reversal of 274778138 is 831877472.

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

It can be written as a sum of positive squares in only one way, i.e., 169859089 + 104919049 = 13033^2 + 10243^2 .

It is a junction number, because it is equal to n+sod(n) for n = 274778092 and 274778101.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68694533 + ... + 68694536.

Almost surely, 2^274778138 is an apocalyptic number.

274778138 is a deficient number, since it is larger than the sum of its proper divisors (137389072).

274778138 is a wasteful number, since it uses less digits than its factorization.

274778138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137389071.

The product of its digits is 526848, while the sum is 47.

The square root of 274778138 is about 16576.4332110379. The cubic root of 274778138 is about 650.1207964846.

The spelling of 274778138 in words is "two hundred seventy-four million, seven hundred seventy-eight thousand, one hundred thirty-eight".