1328338780 has 24 divisors (see below), whose sum is σ = 2910795552. Its totient is φ = 508233792.

The previous prime is 1328338763. The next prime is 1328338783. The reversal of 1328338780 is 878338231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1328338783) 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, 1443387 + ... + 1444306.

It is an arithmetic number, because the mean of its divisors is an integer number (121283148).

Almost surely, 2^1328338780 is an apocalyptic number.

1328338780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1328338780 is an abundant number, since it is smaller than the sum of its proper divisors (1582456772).

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

1328338780 is a wasteful number, since it uses less digits than its factorization.

1328338780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2887725 (or 2887723 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 43.

The square root of 1328338780 is about 36446.3822621670. The cubic root of 1328338780 is about 1099.2663923968.

The spelling of 1328338780 in words is "one billion, three hundred twenty-eight million, three hundred thirty-eight thousand, seven hundred eighty".