30123632 has 80 divisors (see below), whose sum is σ = 74400000. Its totient is φ = 11712960.

The previous prime is 30123631. The next prime is 30123659. The reversal of 30123632 is 23632103.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30123631) 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 15 ways as a sum of consecutive naturals, for example, 60119 + ... + 60617.

It is an arithmetic number, because the mean of its divisors is an integer number (930000).

Almost surely, 2^30123632 is an apocalyptic number.

It is a pronic number, being equal to 5488×5489.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30123632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37200000).

30123632 is an abundant number, since it is smaller than the sum of its proper divisors (44276368).

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

30123632 is a wasteful number, since it uses less digits than its factorization.

30123632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 539 (or 519 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 20.

The square root of 30123632 is about 5488.4999772251. The cubic root of 30123632 is about 311.1495026696.

Adding to 30123632 its reverse (23632103), we get a palindrome (53755735).

The spelling of 30123632 in words is "thirty million, one hundred twenty-three thousand, six hundred thirty-two".