30138953 has 12 divisors (see below), whose sum is σ = 32896080. Its totient is φ = 27598896.

The previous prime is 30138949. The next prime is 30138961. The reversal of 30138953 is 35983103.

It is not a de Polignac number, because 30138953 - 2² = 30138949 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30138973) 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 11 ways as a sum of consecutive naturals, for example, 22850 + ... + 24132.

It is an arithmetic number, because the mean of its divisors is an integer number (2741340).

Almost surely, 2^30138953 is an apocalyptic number.

It is an amenable number.

30138953 is a deficient number, since it is larger than the sum of its proper divisors (2757127).

30138953 is a wasteful number, since it uses less digits than its factorization.

30138953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1448 (or 1435 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 32.

The square root of 30138953 is about 5489.8955363468. The cubic root of 30138953 is about 311.2022443573.

The spelling of 30138953 in words is "thirty million, one hundred thirty-eight thousand, nine hundred fifty-three".