1328022765 has 48 divisors (see below), whose sum is σ = 2462878080. Its totient is φ = 659975040.

The previous prime is 1328022743. The next prime is 1328022821. The reversal of 1328022765 is 5672208231.

It is not a de Polignac number, because 1328022765 - 2⁶ = 1328022701 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 39424 + ... + 64886.

It is an arithmetic number, because the mean of its divisors is an integer number (51309960).

Almost surely, 2^1328022765 is an apocalyptic number.

1328022765 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1328022765 is a deficient number, since it is larger than the sum of its proper divisors (1134855315).

1328022765 is a wasteful number, since it uses less digits than its factorization.

1328022765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25554 (or 25551 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The square root of 1328022765 is about 36442.0466631609. The cubic root of 1328022765 is about 1099.1792127742.

The spelling of 1328022765 in words is "one billion, three hundred twenty-eight million, twenty-two thousand, seven hundred sixty-five".