138794312 has 8 divisors (see below), whose sum is σ = 260239350. Its totient is φ = 69397152.

The previous prime is 138794311. The next prime is 138794317. The reversal of 138794312 is 213497831.

138794312 is nontrivially palindromic in base 16.

It can be written as a sum of positive squares in only one way, i.e., 79103236 + 59691076 = 8894^2 + 7726^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×138794312² = 38527722087106688, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (138794311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8674637 + ... + 8674652.

Almost surely, 2^138794312 is an apocalyptic number.

It is an amenable number.

138794312 is a deficient number, since it is larger than the sum of its proper divisors (121445038).

138794312 is a wasteful number, since it uses less digits than its factorization.

138794312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17349295 (or 17349291 counting only the distinct ones).

The product of its digits is 36288, while the sum is 38.

The square root of 138794312 is about 11781.0997788831. The cubic root of 138794312 is about 517.7545086804.

The spelling of 138794312 in words is "one hundred thirty-eight million, seven hundred ninety-four thousand, three hundred twelve".