1321793940 has 48 divisors (see below), whose sum is σ = 3704254848. Its totient is φ = 352170624.

The previous prime is 1321793939. The next prime is 1321793983. The reversal of 1321793940 is 493971231.

1321793940 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64374 + ... + 82386.

It is an arithmetic number, because the mean of its divisors is an integer number (77171976).

Almost surely, 2^1321793940 is an apocalyptic number.

1321793940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1321793940 is an abundant number, since it is smaller than the sum of its proper divisors (2382460908).

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

1321793940 is a wasteful number, since it uses less digits than its factorization.

1321793940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19248 (or 19246 counting only the distinct ones).

The product of its (nonzero) digits is 40824, while the sum is 39.

The square root of 1321793940 is about 36356.4841534492. The cubic root of 1321793940 is about 1097.4580256292.

The spelling of 1321793940 in words is "one billion, three hundred twenty-one million, seven hundred ninety-three thousand, nine hundred forty".