1321843650 has 96 divisors (see below), whose sum is σ = 3373117440. Its totient is φ = 342377280.

The previous prime is 1321843639. The next prime is 1321843681. The reversal of 1321843650 is 563481231.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1437891 + ... + 1438809.

It is an arithmetic number, because the mean of its divisors is an integer number (35136640).

Almost surely, 2^1321843650 is an apocalyptic number.

1321843650 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 1321843650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1686558720).

1321843650 is an abundant number, since it is smaller than the sum of its proper divisors (2051273790).

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

1321843650 is a wasteful number, since it uses less digits than its factorization.

1321843650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1200 (or 1195 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 1321843650 is about 36357.1677939853. The cubic root of 1321843650 is about 1097.4717831832.

The spelling of 1321843650 in words is "one billion, three hundred twenty-one million, eight hundred forty-three thousand, six hundred fifty".