1323643530 has 64 divisors (see below), whose sum is σ = 3492937728. Its totient is φ = 318346560.

The previous prime is 1323643523. The next prime is 1323643547. The reversal of 1323643530 is 353463231.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 26119 + ... + 57701.

It is an arithmetic number, because the mean of its divisors is an integer number (54577152).

Almost surely, 2^1323643530 is an apocalyptic number.

1323643530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1323643530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1746468864).

1323643530 is an abundant number, since it is smaller than the sum of its proper divisors (2169294198).

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

1323643530 is a wasteful number, since it uses less digits than its factorization.

1323643530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31731.

The product of its (nonzero) digits is 19440, while the sum is 30.

The square root of 1323643530 is about 36381.9121267698. The cubic root of 1323643530 is about 1097.9696790908.

The spelling of 1323643530 in words is "one billion, three hundred twenty-three million, six hundred forty-three thousand, five hundred thirty".