30128880 has 80 divisors (see below), whose sum is σ = 95422464. Its totient is φ = 7860480.

The previous prime is 30128867. The next prime is 30128887. The reversal of 30128880 is 8882103.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30128887) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9945 + ... + 12615.

Almost surely, 2^30128880 is an apocalyptic number.

30128880 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30128880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47711232).

30128880 is an abundant number, since it is smaller than the sum of its proper divisors (65293584).

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

30128880 is a wasteful number, since it uses less digits than its factorization.

30128880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2734 (or 2728 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 30.

The square root of 30128880 is about 5488.9780469592. The cubic root of 30128880 is about 311.1675706301.

The spelling of 30128880 in words is "thirty million, one hundred twenty-eight thousand, eight hundred eighty".