30138148 has 12 divisors (see below), whose sum is σ = 53606812. Its totient is φ = 14821920.

The previous prime is 30138137. The next prime is 30138149. The reversal of 30138148 is 84183103.

It can be written as a sum of positive squares in 2 ways, for example, as 304704 + 29833444 = 552^2 + 5462^2 .

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (30138149) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61515 + ... + 62002.

Almost surely, 2^30138148 is an apocalyptic number.

It is an amenable number.

30138148 is a deficient number, since it is larger than the sum of its proper divisors (23468664).

30138148 is a wasteful number, since it uses less digits than its factorization.

30138148 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123582 (or 123580 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 30138148 is about 5489.8222193437. The cubic root of 30138148 is about 311.1994736346.

The spelling of 30138148 in words is "thirty million, one hundred thirty-eight thousand, one hundred forty-eight".