30713138 has 4 divisors (see below), whose sum is σ = 46069710. Its totient is φ = 15356568.

The previous prime is 30713131. The next prime is 30713143. The reversal of 30713138 is 83131703.

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., 27426169 + 3286969 = 5237^2 + 1813^2 .

It is not an unprimeable number, because it can be changed into a prime (30713131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7678283 + ... + 7678286.

Almost surely, 2^30713138 is an apocalyptic number.

30713138 is a deficient number, since it is larger than the sum of its proper divisors (15356572).

30713138 is a wasteful number, since it uses less digits than its factorization.

30713138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15356571.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 30713138 is about 5541.9435219064. The cubic root of 30713138 is about 313.1660902673.

The spelling of 30713138 in words is "thirty million, seven hundred thirteen thousand, one hundred thirty-eight".