1323489520 has 40 divisors (see below), whose sum is σ = 3097792800. Its totient is φ = 525838080.

The previous prime is 1323489511. The next prime is 1323489551. The reversal of 1323489520 is 259843231.

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 1323489520.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43596 + ... + 67435.

It is an arithmetic number, because the mean of its divisors is an integer number (77444820).

Almost surely, 2^1323489520 is an apocalyptic number.

1323489520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1323489520 is an abundant number, since it is smaller than the sum of its proper divisors (1774303280).

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

1323489520 is a wasteful number, since it uses less digits than its factorization.

1323489520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111193 (or 111187 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 1323489520 is about 36379.7954914538. The cubic root of 1323489520 is about 1097.9270933882.

The spelling of 1323489520 in words is "one billion, three hundred twenty-three million, four hundred eighty-nine thousand, five hundred twenty".