87308520 has 64 divisors (see below), whose sum is σ = 282078720. Its totient is φ = 21490944.

The previous prime is 87308497. The next prime is 87308521. The reversal of 87308520 is 2580378.

It is a super-3 number, since 3×87308520³ (a number of 25 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (87308521) 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, 26424 + ... + 29543.

It is an arithmetic number, because the mean of its divisors is an integer number (4407480).

Almost surely, 2^87308520 is an apocalyptic number.

It is an amenable number.

87308520 is an abundant number, since it is smaller than the sum of its proper divisors (194770200).

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

87308520 is a wasteful number, since it uses less digits than its factorization.

87308520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55994 (or 55990 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 33.

The square root of 87308520 is about 9343.9028248372. The cubic root of 87308520 is about 443.6279246296.

Adding to 87308520 its reverse (2580378), we get a palindrome (89888898).

The spelling of 87308520 in words is "eighty-seven million, three hundred eight thousand, five hundred twenty".