4019868 has 60 divisors (see below), whose sum is σ = 11078760. Its totient is φ = 1267488.

The previous prime is 4019867. The next prime is 4019879. The reversal of 4019868 is 8689104.

It is a happy number.

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 (4019861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 5830 + ... + 6482.

It is an arithmetic number, because the mean of its divisors is an integer number (184646).

Almost surely, 2^4019868 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4019868, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5539380).

4019868 is an abundant number, since it is smaller than the sum of its proper divisors (7058892).

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

4019868 is a wasteful number, since it uses less digits than its factorization.

4019868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 688 (or 677 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 4019868 is about 2004.9608474980. The cubic root of 4019868 is about 159.0024919510.

The spelling of 4019868 in words is "four million, nineteen thousand, eight hundred sixty-eight".