30678031138 has 4 divisors (see below), whose sum is σ = 46017046710. Its totient is φ = 15339015568.

The previous prime is 30678031133. The next prime is 30678031151. The reversal of 30678031138 is 83113087603.

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., 25350053089 + 5327978049 = 159217^2 + 72993^2 .

It is a super-2 number, since 2×30678031138² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 30678031138.

It is not an unprimeable number, because it can be changed into a prime (30678031133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7669507783 + ... + 7669507786.

Almost surely, 2^30678031138 is an apocalyptic number.

30678031138 is a deficient number, since it is larger than the sum of its proper divisors (15339015572).

30678031138 is a wasteful number, since it uses less digits than its factorization.

30678031138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15339015571.

The product of its (nonzero) digits is 72576, while the sum is 40.

The spelling of 30678031138 in words is "thirty billion, six hundred seventy-eight million, thirty-one thousand, one hundred thirty-eight".