4023918 has 40 divisors (see below), whose sum is σ = 9191160. Its totient is φ = 1315440.

The previous prime is 4023913. The next prime is 4023937. The reversal of 4023918 is 8193204.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 4023891 and 4023900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4023913) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 9348 + ... + 9768.

It is an arithmetic number, because the mean of its divisors is an integer number (229779).

Almost surely, 2^4023918 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4023918, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4595580).

4023918 is an abundant number, since it is smaller than the sum of its proper divisors (5167242).

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

4023918 is a wasteful number, since it uses less digits than its factorization.

4023918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 494 (or 485 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 4023918 is about 2005.9705880197. The cubic root of 4023918 is about 159.0558721408.

The spelling of 4023918 in words is "four million, twenty-three thousand, nine hundred eighteen".