3128634780 has 96 divisors (see below), whose sum is σ = 9331531776. Its totient is φ = 780481536.

The previous prime is 3128634779. The next prime is 3128634827. The reversal of 3128634780 is 874368213.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 161157 + ... + 179523.

It is an arithmetic number, because the mean of its divisors is an integer number (97203456).

Almost surely, 2^3128634780 is an apocalyptic number.

3128634780 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 3128634780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4665765888).

3128634780 is an abundant number, since it is smaller than the sum of its proper divisors (6202896996).

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

3128634780 is a wasteful number, since it uses less digits than its factorization.

3128634780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18563 (or 18561 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 42.

The square root of 3128634780 is about 55934.2004501718. The cubic root of 3128634780 is about 1462.5754847444.

It can be divided in two parts, 31286 and 34780, that added together give a palindrome (66066).

The spelling of 3128634780 in words is "three billion, one hundred twenty-eight million, six hundred thirty-four thousand, seven hundred eighty".