30138168 has 16 divisors (see below), whose sum is σ = 75345480. Its totient is φ = 10046048.

The previous prime is 30138167. The next prime is 30138193. The reversal of 30138168 is 86183103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30138167) 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, 627855 + ... + 627902.

Almost surely, 2^30138168 is an apocalyptic number.

It is an amenable number.

30138168 is an abundant number, since it is smaller than the sum of its proper divisors (45207312).

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

30138168 is a wasteful number, since it uses less digits than its factorization.

30138168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1255766 (or 1255762 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 30138168 is about 5489.8240408960. The cubic root of 30138168 is about 311.1995424731.

The spelling of 30138168 in words is "thirty million, one hundred thirty-eight thousand, one hundred sixty-eight".