8487520240 has 80 divisors (see below), whose sum is σ = 20035780128. Its totient is φ = 3343269888.

The previous prime is 8487520231. The next prime is 8487520241. The reversal of 8487520240 is 420257848.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 8487520193 and 8487520202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8487520241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2235784 + ... + 2239576.

Almost surely, 2^8487520240 is an apocalyptic number.

8487520240 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 8487520240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10017890064).

8487520240 is an abundant number, since it is smaller than the sum of its proper divisors (11548259888).

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

8487520240 is a wasteful number, since it uses less digits than its factorization.

8487520240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4226 (or 4220 counting only the distinct ones).

The product of its (nonzero) digits is 143360, while the sum is 40.

The square root of 8487520240 is about 92127.7387109876. The cubic root of 8487520240 is about 2039.8282759461.

The spelling of 8487520240 in words is "eight billion, four hundred eighty-seven million, five hundred twenty thousand, two hundred forty".