1321993824 has 48 divisors (see below), whose sum is σ = 3481470720. Its totient is φ = 439237760.

The previous prime is 1321993811. The next prime is 1321993847. The reversal of 1321993824 is 4283991231.

It is a tau number, because it is divible by the number of its divisors (48).

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, 7717 + ... + 51995.

It is an arithmetic number, because the mean of its divisors is an integer number (72530640).

Almost surely, 2^1321993824 is an apocalyptic number.

It is an amenable number.

1321993824 is an abundant number, since it is smaller than the sum of its proper divisors (2159476896).

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

1321993824 is a wasteful number, since it uses less digits than its factorization.

1321993824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44603 (or 44595 counting only the distinct ones).

The product of its digits is 93312, while the sum is 42.

The square root of 1321993824 is about 36359.2329952104. The cubic root of 1321993824 is about 1097.5133426840.

The spelling of 1321993824 in words is "one billion, three hundred twenty-one million, nine hundred ninety-three thousand, eight hundred twenty-four".