3123349280 has 72 divisors (see below), whose sum is σ = 7540104348. Its totient is φ = 1222619648.

The previous prime is 3123349279. The next prime is 3123349289. The reversal of 3123349280 is 829433213.

It can be written as a sum of positive squares in 2 ways, for example, as 2830665616 + 292683664 = 53204^2 + 17108^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 3123349280.

It is not an unprimeable number, because it can be changed into a prime (3123349289) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 349022 + ... + 357858.

Almost surely, 2^3123349280 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 3123349280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3770052174).

3123349280 is an abundant number, since it is smaller than the sum of its proper divisors (4416755068).

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

3123349280 is an equidigital number, since it uses as much as digits as its factorization.

3123349280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8946 (or 8891 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 35.

The square root of 3123349280 is about 55886.9329986894. The cubic root of 3123349280 is about 1461.7513979232.

The spelling of 3123349280 in words is "three billion, one hundred twenty-three million, three hundred forty-nine thousand, two hundred eighty".