30138510 has 64 divisors (see below), whose sum is σ = 77967360. Its totient is φ = 7434240.

The previous prime is 30138509. The next prime is 30138517. The reversal of 30138510 is 1583103.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30138517) 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 31 ways as a sum of consecutive naturals, for example, 20686 + ... + 22094.

It is an arithmetic number, because the mean of its divisors is an integer number (1218240).

Almost surely, 2^30138510 is an apocalyptic number.

30138510 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 30138510, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38983680).

30138510 is an abundant number, since it is smaller than the sum of its proper divisors (47828850).

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

30138510 is a wasteful number, since it uses less digits than its factorization.

30138510 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1473.

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 30138510 is about 5489.8551893470. The cubic root of 30138510 is about 311.2007196054.

The spelling of 30138510 in words is "thirty million, one hundred thirty-eight thousand, five hundred ten".