1331442860 has 144 divisors (see below), whose sum is σ = 3378412800. Its totient is φ = 438387840.

The previous prime is 1331442829. The next prime is 1331442863. The reversal of 1331442860 is 682441331.

1331442860 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (1331442863) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1056911 + ... + 1058169.

It is an arithmetic number, because the mean of its divisors is an integer number (23461200).

Almost surely, 2^1331442860 is an apocalyptic number.

1331442860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1331442860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1689206400).

1331442860 is an abundant number, since it is smaller than the sum of its proper divisors (2046969940).

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

1331442860 is a wasteful number, since it uses less digits than its factorization.

1331442860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1332 (or 1319 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 1331442860 is about 36488.9416124941. The cubic root of 1331442860 is about 1100.1219864716.

The spelling of 1331442860 in words is "one billion, three hundred thirty-one million, four hundred forty-two thousand, eight hundred sixty".