306876138 has 16 divisors (see below), whose sum is σ = 618169440. Its totient is φ = 101555856.

The previous prime is 306876137. The next prime is 306876139. The reversal of 306876138 is 831678603.

It is an interprime number because it is at equal distance from previous prime (306876137) and next prime (306876139).

It is a self number, because there is not a number n which added to its sum of digits gives 306876138.

It is not an unprimeable number, because it can be changed into a prime (306876137) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 183145 + ... + 184812.

It is an arithmetic number, because the mean of its divisors is an integer number (38635590).

Almost surely, 2^306876138 is an apocalyptic number.

306876138 is an abundant number, since it is smaller than the sum of its proper divisors (311293302).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

306876138 is a wasteful number, since it uses less digits than its factorization.

306876138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 368101.

The product of its (nonzero) digits is 145152, while the sum is 42.

The square root of 306876138 is about 17517.8805224833. The cubic root of 306876138 is about 674.5089344666.

The spelling of 306876138 in words is "three hundred six million, eight hundred seventy-six thousand, one hundred thirty-eight".