1913868 has 72 divisors (see below), whose sum is σ = 5503680. Its totient is φ = 576720.

The previous prime is 1913867. The next prime is 1913893. The reversal of 1913868 is 8683191.

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

It is not an unprimeable number, because it can be changed into a prime (1913861) 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, 10603 + ... + 10781.

It is an arithmetic number, because the mean of its divisors is an integer number (76440).

2^1913868 is an apocalyptic number.

1913868 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 1913868, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2751840).

1913868 is an abundant number, since it is smaller than the sum of its proper divisors (3589812).

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

1913868 is a wasteful number, since it uses less digits than its factorization.

1913868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209 (or 195 counting only the distinct ones).

The product of its digits is 10368, while the sum is 36.

The square root of 1913868 is about 1383.4261816230. The cubic root of 1913868 is about 124.1568428084.

The spelling of 1913868 in words is "one million, nine hundred thirteen thousand, eight hundred sixty-eight".