30136644 has 48 divisors (see below), whose sum is σ = 78503040. Its totient is φ = 9997920.

The previous prime is 30136643. The next prime is 30136649. The reversal of 30136644 is 44663103.

30136644 is a `hidden beast` number, since 3 + 0 + 13 + 6 + 644 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30136643) 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, 27874 + ... + 28934.

It is an arithmetic number, because the mean of its divisors is an integer number (1635480).

Almost surely, 2^30136644 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30136644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39251520).

30136644 is an abundant number, since it is smaller than the sum of its proper divisors (48366396).

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

30136644 is a wasteful number, since it uses less digits than its factorization.

30136644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1337 (or 1329 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

The square root of 30136644 is about 5489.6852368783. The cubic root of 30136644 is about 311.1942968977.

Adding to 30136644 its reverse (44663103), we get a palindrome (74799747).

The spelling of 30136644 in words is "thirty million, one hundred thirty-six thousand, six hundred forty-four".