307138 has 8 divisors (see below), whose sum is σ = 496188. Its totient is φ = 141744.

The previous prime is 307129. The next prime is 307147. The reversal of 307138 is 831703.

It is an interprime number because it is at equal distance from previous prime (307129) and next prime (307147).

It can be written as a sum of positive squares in 2 ways, for example, as 288369 + 18769 = 537^2 + 137^2 .

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

It is an unprimeable number.

307138 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5881 + ... + 5932.

2³⁰⁷¹³⁸ is an apocalyptic number.

307138 is a deficient number, since it is larger than the sum of its proper divisors (189050).

307138 is a wasteful number, since it uses less digits than its factorization.

307138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11828.

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 307138 is about 554.2003247924. The cubic root of 307138 is about 67.4700736110.

The spelling of 307138 in words is "three hundred seven thousand, one hundred thirty-eight".