1213627138 has 8 divisors (see below), whose sum is σ = 1859173632. Its totient is φ = 593902596.

The previous prime is 1213627133. The next prime is 1213627157. The reversal of 1213627138 is 8317263121.

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 (1213627133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6455370 + ... + 6455557.

It is an arithmetic number, because the mean of its divisors is an integer number (232396704).

Almost surely, 2^1213627138 is an apocalyptic number.

1213627138 is a deficient number, since it is larger than the sum of its proper divisors (645546494).

1213627138 is a wasteful number, since it uses less digits than its factorization.

1213627138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12910976.

The product of its digits is 12096, while the sum is 34.

The square root of 1213627138 is about 34837.1516918361. The cubic root of 1213627138 is about 1066.6659366965.

The spelling of 1213627138 in words is "one billion, two hundred thirteen million, six hundred twenty-seven thousand, one hundred thirty-eight".