30711138 has 16 divisors (see below), whose sum is σ = 61482240. Its totient is φ = 10227056.

The previous prime is 30711127. The next prime is 30711139. The reversal of 30711138 is 83111703.

It is not an unprimeable number, because it can be changed into a prime (30711139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6856 + ... + 10412.

It is an arithmetic number, because the mean of its divisors is an integer number (3842640).

Almost surely, 2^30711138 is an apocalyptic number.

30711138 is an abundant number, since it is smaller than the sum of its proper divisors (30771102).

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

30711138 is a wasteful number, since it uses less digits than its factorization.

30711138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5001.

The product of its (nonzero) digits is 504, while the sum is 24.

The square root of 30711138 is about 5541.7630768556. The cubic root of 30711138 is about 313.1592924622.

The spelling of 30711138 in words is "thirty million, seven hundred eleven thousand, one hundred thirty-eight".