1323964728 has 48 divisors (see below), whose sum is σ = 3587836200. Its totient is φ = 441063360.

The previous prime is 1323964723. The next prime is 1323964769. The reversal of 1323964728 is 8274693231.

It is a super-2 number, since 2×1323964728² = 3505765201976227968, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1323964721) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 149118 + ... + 157746.

Almost surely, 2^1323964728 is an apocalyptic number.

1323964728 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1323964728 is an abundant number, since it is smaller than the sum of its proper divisors (2263871472).

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

1323964728 is a wasteful number, since it uses less digits than its factorization.

1323964728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10772 (or 10765 counting only the distinct ones).

The product of its digits is 435456, while the sum is 45.

The square root of 1323964728 is about 36386.3261129782. The cubic root of 1323964728 is about 1098.0584837512.

The spelling of 1323964728 in words is "one billion, three hundred twenty-three million, nine hundred sixty-four thousand, seven hundred twenty-eight".