1328707800 has 240 divisors, whose sum is σ = 5274506160. Its totient is φ = 303678720.

The previous prime is 1328707781. The next prime is 1328707801. The reversal of 1328707800 is 87078231.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1328707801) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 107542 + ... + 119258.

It is an arithmetic number, because the mean of its divisors is an integer number (21977109).

Almost surely, 2^1328707800 is an apocalyptic number.

1328707800 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 1328707800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2637253080).

1328707800 is an abundant number, since it is smaller than the sum of its proper divisors (3945798360).

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

1328707800 is a wasteful number, since it uses less digits than its factorization.

1328707800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11752 (or 11734 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 36.

The square root of 1328707800 is about 36451.4444158253. Note that the first 4 decimals coincide. The cubic root of 1328707800 is about 1099.3681771051.

The spelling of 1328707800 in words is "one billion, three hundred twenty-eight million, seven hundred seven thousand, eight hundred".