381361138 has 4 divisors (see below), whose sum is σ = 572041710. Its totient is φ = 190680568.

The previous prime is 381361133. The next prime is 381361139. The reversal of 381361138 is 831163183.

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., 367987489 + 13373649 = 19183^2 + 3657^2 .

It is not an unprimeable number, because it can be changed into a prime (381361133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95340283 + ... + 95340286.

Almost surely, 2^381361138 is an apocalyptic number.

381361138 is a deficient number, since it is larger than the sum of its proper divisors (190680572).

381361138 is a wasteful number, since it uses less digits than its factorization.

381361138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190680571.

The product of its digits is 10368, while the sum is 34.

The square root of 381361138 is about 19528.4699349437. The cubic root of 381361138 is about 725.1794327183.

The spelling of 381361138 in words is "three hundred eighty-one million, three hundred sixty-one thousand, one hundred thirty-eight".