1913894568 has 80 divisors (see below), whose sum is σ = 5485423680. Its totient is φ = 623119392.

The previous prime is 1913894557. The next prime is 1913894573. The reversal of 1913894568 is 8654983191.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 6480 + ... + 62207.

It is an arithmetic number, because the mean of its divisors is an integer number (68567796).

Almost surely, 2^1913894568 is an apocalyptic number.

1913894568 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 1913894568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2742711840).

1913894568 is an abundant number, since it is smaller than the sum of its proper divisors (3571529112).

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

1913894568 is a wasteful number, since it uses less digits than its factorization.

1913894568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68748 (or 68735 counting only the distinct ones).

The product of its digits is 1866240, while the sum is 54.

The square root of 1913894568 is about 43748.0807350448. The cubic root of 1913894568 is about 1241.5741731401.

The spelling of 1913894568 in words is "one billion, nine hundred thirteen million, eight hundred ninety-four thousand, five hundred sixty-eight".