30926139 has 8 divisors (see below), whose sum is σ = 41274192. Its totient is φ = 20597760.

The previous prime is 30926131. The next prime is 30926143. The reversal of 30926139 is 93162903.

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

It is not a de Polignac number, because 30926139 - 2³ = 30926131 is a prime.

It is not an unprimeable number, because it can be changed into a prime (30926131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 742 + ... + 7899.

It is an arithmetic number, because the mean of its divisors is an integer number (5159274).

Almost surely, 2^30926139 is an apocalyptic number.

30926139 is a deficient number, since it is larger than the sum of its proper divisors (10348053).

30926139 is a wasteful number, since it uses less digits than its factorization.

30926139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9837.

The product of its (nonzero) digits is 8748, while the sum is 33.

The square root of 30926139 is about 5561.1274935934. The cubic root of 30926139 is about 313.8883770280. Note that the first 3 decimals are identical.

The spelling of 30926139 in words is "thirty million, nine hundred twenty-six thousand, one hundred thirty-nine".