1331443830 has 64 divisors (see below), whose sum is σ = 3316059648. Its totient is φ = 341886720.

The previous prime is 1331443823. The next prime is 1331443843. The reversal of 1331443830 is 383441331.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

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 31 ways as a sum of consecutive naturals, for example, 84322 + ... + 98858.

It is an arithmetic number, because the mean of its divisors is an integer number (51813432).

Almost surely, 2^1331443830 is an apocalyptic number.

1331443830 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 1331443830, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1658029824).

1331443830 is an abundant number, since it is smaller than the sum of its proper divisors (1984615818).

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

1331443830 is a wasteful number, since it uses less digits than its factorization.

1331443830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14661.

The product of its (nonzero) digits is 10368, while the sum is 30.

The square root of 1331443830 is about 36488.9549041898. The cubic root of 1331443830 is about 1100.1222536299.

The spelling of 1331443830 in words is "one billion, three hundred thirty-one million, four hundred forty-three thousand, eight hundred thirty".