8420438862 has 64 divisors (see below), whose sum is σ = 20451697920. Its totient is φ = 2546834400.

The previous prime is 8420438857. The next prime is 8420438899. The reversal of 8420438862 is 2688340248.

8420438862 is a `hidden beast` number, since 8 + 4 + 204 + 388 + 62 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 308253 + ... + 334455.

It is an arithmetic number, because the mean of its divisors is an integer number (319557780).

Almost surely, 2^8420438862 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8420438862, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10225848960).

8420438862 is an abundant number, since it is smaller than the sum of its proper divisors (12031259058).

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

8420438862 is a wasteful number, since it uses less digits than its factorization.

8420438862 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26766 (or 26760 counting only the distinct ones).

The product of its (nonzero) digits is 589824, while the sum is 45.

The square root of 8420438862 is about 91762.9492878253. The cubic root of 8420438862 is about 2034.4401071648.

The spelling of 8420438862 in words is "eight billion, four hundred twenty million, four hundred thirty-eight thousand, eight hundred sixty-two".