30913138 has 8 divisors (see below), whose sum is σ = 47865600. Its totient is φ = 14957940.

The previous prime is 30913117. The next prime is 30913177. The reversal of 30913138 is 83131903.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 249238 + ... + 249361.

It is an arithmetic number, because the mean of its divisors is an integer number (5983200).

Almost surely, 2^30913138 is an apocalyptic number.

30913138 is a deficient number, since it is larger than the sum of its proper divisors (16952462).

30913138 is a wasteful number, since it uses less digits than its factorization.

30913138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 498632.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 30913138 is about 5559.9584530822. The cubic root of 30913138 is about 313.8443858186.

The spelling of 30913138 in words is "thirty million, nine hundred thirteen thousand, one hundred thirty-eight".