30618139 has 8 divisors (see below), whose sum is σ = 34125840. Its totient is φ = 27300096.

The previous prime is 30618131. The next prime is 30618163. The reversal of 30618139 is 93181603.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 30618139 - 2³ = 30618131 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 30618139.

It is not an unprimeable number, because it can be changed into a prime (30618131) 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, 47074 + ... + 47719.

It is an arithmetic number, because the mean of its divisors is an integer number (4265730).

Almost surely, 2^30618139 is an apocalyptic number.

30618139 is a deficient number, since it is larger than the sum of its proper divisors (3507701).

30618139 is a wasteful number, since it uses less digits than its factorization.

30618139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94829.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 30618139 is about 5533.3659737993. The cubic root of 30618139 is about 312.8428714544.

The spelling of 30618139 in words is "thirty million, six hundred eighteen thousand, one hundred thirty-nine".