87530320 has 20 divisors (see below), whose sum is σ = 203508180. Its totient is φ = 35012096.

The previous prime is 87530293. The next prime is 87530347. The reversal of 87530320 is 2303578.

It is an interprime number because it is at equal distance from previous prime (87530293) and next prime (87530347).

It can be written as a sum of positive squares in 2 ways, for example, as 41886784 + 45643536 = 6472^2 + 6756^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 546985 + ... + 547144.

It is an arithmetic number, because the mean of its divisors is an integer number (10175409).

Almost surely, 2^87530320 is an apocalyptic number.

87530320 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

87530320 is an abundant number, since it is smaller than the sum of its proper divisors (115977860).

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

87530320 is a wasteful number, since it uses less digits than its factorization.

87530320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1094142 (or 1094136 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 87530320 is about 9355.7639987336. The cubic root of 87530320 is about 444.0032735197.

Adding to 87530320 its reverse (2303578), we get a palindrome (89833898).

The spelling of 87530320 in words is "eighty-seven million, five hundred thirty thousand, three hundred twenty".