1328642250 has 256 divisors, whose sum is σ = 3824271360. Its totient is φ = 304819200.

The previous prime is 1328642243. The next prime is 1328642261. The reversal of 1328642250 is 522468231.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 10461687 + ... + 10461813.

It is an arithmetic number, because the mean of its divisors is an integer number (14938560).

Almost surely, 2^1328642250 is an apocalyptic number.

1328642250 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 1328642250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1912135680).

1328642250 is an abundant number, since it is smaller than the sum of its proper divisors (2495629110).

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

1328642250 is a wasteful number, since it uses less digits than its factorization.

1328642250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226 (or 216 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 33.

The square root of 1328642250 is about 36450.5452634114. The cubic root of 1328642250 is about 1099.3500981944.

The spelling of 1328642250 in words is "one billion, three hundred twenty-eight million, six hundred forty-two thousand, two hundred fifty".