1331075328 has 72 divisors (see below), whose sum is σ = 3864680736. Its totient is φ = 403353600.

The previous prime is 1331075323. The next prime is 1331075387. The reversal of 1331075328 is 8235701331.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (1331075323) 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 7 ways as a sum of consecutive naturals, for example, 70333 + ... + 87228.

Almost surely, 2^1331075328 is an apocalyptic number.

It is an amenable number.

1331075328 is an abundant number, since it is smaller than the sum of its proper divisors (2533605408).

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

1331075328 is a wasteful number, since it uses less digits than its factorization.

1331075328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157591 (or 157577 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 33.

The square root of 1331075328 is about 36483.9050541468. The cubic root of 1331075328 is about 1100.0207511237.

Adding to 1331075328 its reverse (8235701331), we get a palindrome (9566776659).

The spelling of 1331075328 in words is "one billion, three hundred thirty-one million, seventy-five thousand, three hundred twenty-eight".