4023978420 has 144 divisors (see below), whose sum is σ = 14153940864. Its totient is φ = 836140800.

The previous prime is 4023978419. The next prime is 4023978437. The reversal of 4023978420 is 248793204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 11230 + ... + 90410.

It is an arithmetic number, because the mean of its divisors is an integer number (98291256).

Almost surely, 2^4023978420 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 4023978420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7076970432).

4023978420 is an abundant number, since it is smaller than the sum of its proper divisors (10129962444).

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

4023978420 is a wasteful number, since it uses less digits than its factorization.

4023978420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79222 (or 79209 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 39.

The square root of 4023978420 is about 63434.8360130299. The cubic root of 4023978420 is about 1590.5666822296.

The spelling of 4023978420 in words is "four billion, twenty-three million, nine hundred seventy-eight thousand, four hundred twenty".