1331673928 has 64 divisors (see below), whose sum is σ = 2749824000. Its totient is φ = 600867072.

The previous prime is 1331673911. The next prime is 1331673947. The reversal of 1331673928 is 8293761331.

It is a happy 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 15 ways as a sum of consecutive naturals, for example, 894801 + ... + 896287.

It is an arithmetic number, because the mean of its divisors is an integer number (42966000).

Almost surely, 2^1331673928 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 1331673928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1374912000).

1331673928 is an abundant number, since it is smaller than the sum of its proper divisors (1418150072).

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

1331673928 is a wasteful number, since it uses less digits than its factorization.

1331673928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1694 (or 1690 counting only the distinct ones).

The product of its digits is 163296, while the sum is 43.

The square root of 1331673928 is about 36492.1077494847. The cubic root of 1331673928 is about 1100.1856237709.

The spelling of 1331673928 in words is "one billion, three hundred thirty-one million, six hundred seventy-three thousand, nine hundred twenty-eight".