30117642 has 16 divisors (see below), whose sum is σ = 63778752. Its totient is φ = 9448640.

The previous prime is 30117617. The next prime is 30117643. The reversal of 30117642 is 24671103.

It is not an unprimeable number, because it can be changed into a prime (30117643) 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, 147534 + ... + 147737.

It is an arithmetic number, because the mean of its divisors is an integer number (3986172).

Almost surely, 2^30117642 is an apocalyptic number.

30117642 is an abundant number, since it is smaller than the sum of its proper divisors (33661110).

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

30117642 is a wasteful number, since it uses less digits than its factorization.

30117642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 295293.

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 30117642 is about 5487.9542636578. The cubic root of 30117642 is about 311.1288775663.

Adding to 30117642 its reverse (24671103), we get a palindrome (54788745).

The spelling of 30117642 in words is "thirty million, one hundred seventeen thousand, six hundred forty-two".