30881144 has 32 divisors (see below), whose sum is σ = 66636000. Its totient is φ = 13142400.

The previous prime is 30881141. The next prime is 30881167. The reversal of 30881144 is 44118803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30881141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6494 + ... + 10194.

It is an arithmetic number, because the mean of its divisors is an integer number (2082375).

Almost surely, 2^30881144 is an apocalyptic number.

It is an amenable number.

30881144 is an abundant number, since it is smaller than the sum of its proper divisors (35754856).

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

30881144 is a wasteful number, since it uses less digits than its factorization.

30881144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3863 (or 3859 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 29.

The square root of 30881144 is about 5557.0805284790. The cubic root of 30881144 is about 313.7360758465.

Adding to 30881144 its reverse (44118803), we get a palindrome (74999947).

The spelling of 30881144 in words is "thirty million, eight hundred eighty-one thousand, one hundred forty-four".