1321838860 has 24 divisors (see below), whose sum is σ = 2797724160. Its totient is φ = 524571264.

The previous prime is 1321838839. The next prime is 1321838867. The reversal of 1321838860 is 688381231.

It is not an unprimeable number, because it can be changed into a prime (1321838867) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 257665 + ... + 262744.

It is an arithmetic number, because the mean of its divisors is an integer number (116571840).

Almost surely, 2^1321838860 is an apocalyptic number.

1321838860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1321838860 is an abundant number, since it is smaller than the sum of its proper divisors (1475885300).

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

1321838860 is a wasteful number, since it uses less digits than its factorization.

1321838860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 520545 (or 520543 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 40.

The square root of 1321838860 is about 36357.1019197075. The cubic root of 1321838860 is about 1097.4704575357.

The spelling of 1321838860 in words is "one billion, three hundred twenty-one million, eight hundred thirty-eight thousand, eight hundred sixty".