1322878128 has 160 divisors (see below), whose sum is σ = 4145068032. Its totient is φ = 358041600.

The previous prime is 1322878127. The next prime is 1322878133. The reversal of 1322878128 is 8218782231.

It is a self number, because there is not a number n which added to its sum of digits gives 1322878128.

It is not an unprimeable number, because it can be changed into a prime (1322878127) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 209676 + ... + 215892.

Almost surely, 2^1322878128 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 1322878128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2072534016).

1322878128 is an abundant number, since it is smaller than the sum of its proper divisors (2822189904).

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

1322878128 is a wasteful number, since it uses less digits than its factorization.

1322878128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6283 (or 6277 counting only the distinct ones).

The product of its digits is 86016, while the sum is 42.

The square root of 1322878128 is about 36371.3916148393. The cubic root of 1322878128 is about 1097.7580032110.

The spelling of 1322878128 in words is "one billion, three hundred twenty-two million, eight hundred seventy-eight thousand, one hundred twenty-eight".