8420448540 has 96 divisors (see below), whose sum is σ = 27387247104. Its totient is φ = 1893116160.

The previous prime is 8420448539. The next prime is 8420448541. The reversal of 8420448540 is 458440248.

It is an interprime number because it is at equal distance from previous prime (8420448539) and next prime (8420448541).

It is a super-2 number, since 2×8420448540² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8420448541) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 138714 + ... + 189953.

It is an arithmetic number, because the mean of its divisors is an integer number (285283824).

Almost surely, 2^8420448540 is an apocalyptic number.

It is an amenable number.

8420448540 is an abundant number, since it is smaller than the sum of its proper divisors (18966798564).

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

8420448540 is a wasteful number, since it uses less digits than its factorization.

8420448540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 328747 (or 328745 counting only the distinct ones).

The product of its (nonzero) digits is 163840, while the sum is 39.

The square root of 8420448540 is about 91763.0020215119. The cubic root of 8420448540 is about 2034.4408865898.

Adding to 8420448540 its reverse (458440248), we get a palindrome (8878888788).

The spelling of 8420448540 in words is "eight billion, four hundred twenty million, four hundred forty-eight thousand, five hundred forty".