8487197920 has 24 divisors (see below), whose sum is σ = 20051005464. Its totient is φ = 3394879104.

The previous prime is 8487197891. The next prime is 8487197921. The reversal of 8487197920 is 297917848.

It is a happy number.

It is a Smith number, since the sum of its digits (55) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8487197921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26522334 + ... + 26522653.

It is an arithmetic number, because the mean of its divisors is an integer number (835458561).

Almost surely, 2^8487197920 is an apocalyptic number.

8487197920 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

8487197920 is an abundant number, since it is smaller than the sum of its proper divisors (11563807544).

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

8487197920 is a wasteful number, since it uses less digits than its factorization.

8487197920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53045002 (or 53044994 counting only the distinct ones).

The product of its (nonzero) digits is 2032128, while the sum is 55.

The square root of 8487197920 is about 92125.9893841038. The cubic root of 8487197920 is about 2039.8024542787.

The spelling of 8487197920 in words is "eight billion, four hundred eighty-seven million, one hundred ninety-seven thousand, nine hundred twenty".