30138625 has 32 divisors (see below), whose sum is σ = 42861312. Its totient is φ = 20944000.

The previous prime is 30138611. The next prime is 30138629. The reversal of 30138625 is 52683103.

It is not a de Polignac number, because 30138625 - 2¹¹ = 30136577 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30138593 and 30138602.

It is not an unprimeable number, because it can be changed into a prime (30138629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 31149 + ... + 32101.

It is an arithmetic number, because the mean of its divisors is an integer number (1339416).

Almost surely, 2^30138625 is an apocalyptic number.

It is an amenable number.

30138625 is a deficient number, since it is larger than the sum of its proper divisors (12722687).

30138625 is a wasteful number, since it uses less digits than its factorization.

30138625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1002 (or 992 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 30138625 is about 5489.8656632016. The cubic root of 30138625 is about 311.2011154228.

The spelling of 30138625 in words is "thirty million, one hundred thirty-eight thousand, six hundred twenty-five".