30138448 has 20 divisors (see below), whose sum is σ = 60277888. Its totient is φ = 14582880.

The previous prime is 30138413. The next prime is 30138469. The reversal of 30138448 is 84483103.

30138448 is an admirable number.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 29886 + ... + 30877.

Almost surely, 2^30138448 is an apocalyptic number.

It is an amenable number.

30138448 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

30138448 is a wasteful number, since it uses less digits than its factorization.

30138448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60802 (or 60796 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 31.

The square root of 30138448 is about 5489.8495425649. The cubic root of 30138448 is about 311.2005062078.

The spelling of 30138448 in words is "thirty million, one hundred thirty-eight thousand, four hundred forty-eight".