30081888 has 96 divisors (see below), whose sum is σ = 90205920. Its totient is φ = 9745920.

The previous prime is 30081869. The next prime is 30081901. The reversal of 30081888 is 88818003.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31498 + ... + 32438.

It is an arithmetic number, because the mean of its divisors is an integer number (939645).

Almost surely, 2^30081888 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 30081888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45102960).

30081888 is an abundant number, since it is smaller than the sum of its proper divisors (60124032).

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

30081888 is a wasteful number, since it uses less digits than its factorization.

30081888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 997 (or 983 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 36.

The square root of 30081888 is about 5484.6957983101. The cubic root of 30081888 is about 311.0057104785.

The spelling of 30081888 in words is "thirty million, eighty-one thousand, eight hundred eighty-eight".