1328860944 has 160 divisors (see below), whose sum is σ = 3925463040. Its totient is φ = 430230528.

The previous prime is 1328860937. The next prime is 1328860961. The reversal of 1328860944 is 4490688231.

It is a happy number.

1328860944 is a `hidden beast` number, since 1 + 32 + 8 + 8 + 609 + 4 + 4 = 666.

It is a super-2 number, since 2×1328860944² = 3531742816977142272, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1328860944.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2907564 + ... + 2908020.

It is an arithmetic number, because the mean of its divisors is an integer number (24534144).

Almost surely, 2^1328860944 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 1328860944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1962731520).

1328860944 is an abundant number, since it is smaller than the sum of its proper divisors (2596602096).

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

1328860944 is a wasteful number, since it uses less digits than its factorization.

1328860944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 654 (or 642 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 45.

The square root of 1328860944 is about 36453.5450127968. The cubic root of 1328860944 is about 1099.4104124188.

The spelling of 1328860944 in words is "one billion, three hundred twenty-eight million, eight hundred sixty thousand, nine hundred forty-four".