3128442880 has 60 divisors (see below), whose sum is σ = 7508230380. Its totient is φ = 1251344384.

The previous prime is 3128442869. The next prime is 3128442881. The reversal of 3128442880 is 882448213.

It can be written as a sum of positive squares in 2 ways, for example, as 661929984 + 2466512896 = 25728^2 + 49664^2 .

It is a Harshad number since it is a multiple of its sum of digits (40).

It is not an unprimeable number, because it can be changed into a prime (3128442881) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62826 + ... + 101014.

It is an arithmetic number, because the mean of its divisors is an integer number (125137173).

Almost surely, 2^3128442880 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 3128442880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3754115190).

3128442880 is an abundant number, since it is smaller than the sum of its proper divisors (4379787500).

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

3128442880 is an frugal number, since it uses more digits than its factorization.

3128442880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38222 (or 38196 counting only the distinct ones).

The product of its (nonzero) digits is 98304, while the sum is 40.

The square root of 3128442880 is about 55932.4850154184. The cubic root of 3128442880 is about 1462.5455809691.

The spelling of 3128442880 in words is "three billion, one hundred twenty-eight million, four hundred forty-two thousand, eight hundred eighty".