1328381910 has 64 divisors (see below), whose sum is σ = 3574929600. Its totient is φ = 350977536.

The previous prime is 1328381909. The next prime is 1328381911. The reversal of 1328381910 is 191838231.

It is an interprime number because it is at equal distance from previous prime (1328381909) and next prime (1328381911).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1328381911) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6862 + ... + 51998.

It is an arithmetic number, because the mean of its divisors is an integer number (55858275).

Almost surely, 2^1328381910 is an apocalyptic number.

1328381910 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 1328381910, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1787464800).

1328381910 is an abundant number, since it is smaller than the sum of its proper divisors (2246547690).

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

1328381910 is a wasteful number, since it uses less digits than its factorization.

1328381910 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45262 (or 45256 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 1328381910 is about 36446.9739484638. The cubic root of 1328381910 is about 1099.2782896746.

The spelling of 1328381910 in words is "one billion, three hundred twenty-eight million, three hundred eighty-one thousand, nine hundred ten".