1913666328 has 96 divisors (see below), whose sum is σ = 6011765760. Its totient is φ = 538591680.

The previous prime is 1913666323. The next prime is 1913666329. The reversal of 1913666328 is 8236663191.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1913666323) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5433 + ... + 62103.

It is an arithmetic number, because the mean of its divisors is an integer number (62622560).

Almost surely, 2^1913666328 is an apocalyptic number.

1913666328 is a gapful number since it is divisible by the number (18) 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 1913666328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3005882880).

1913666328 is an abundant number, since it is smaller than the sum of its proper divisors (4098099432).

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

1913666328 is a wasteful number, since it uses less digits than its factorization.

1913666328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56757 (or 56750 counting only the distinct ones).

The product of its digits is 279936, while the sum is 45.

The square root of 1913666328 is about 43745.4720856913. The cubic root of 1913666328 is about 1241.5248168591.

The spelling of 1913666328 in words is "one billion, nine hundred thirteen million, six hundred sixty-six thousand, three hundred twenty-eight".