8547481920 has 112 divisors (see below), whose sum is σ = 27311591808. Its totient is φ = 2264770560.

The previous prime is 8547481897. The next prime is 8547481931. The reversal of 8547481920 is 291847458.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 8547481920.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 122365 + ... + 179075.

Almost surely, 2^8547481920 is an apocalyptic number.

8547481920 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8547481920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13655795904).

8547481920 is an abundant number, since it is smaller than the sum of its proper divisors (18764109888).

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

8547481920 is a wasteful number, since it uses less digits than its factorization.

8547481920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56888 (or 56878 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 48.

The square root of 8547481920 is about 92452.5928246472. The cubic root of 8547481920 is about 2044.6205914532.

The spelling of 8547481920 in words is "eight billion, five hundred forty-seven million, four hundred eighty-one thousand, nine hundred twenty".