87245520 has 40 divisors (see below), whose sum is σ = 270461856. Its totient is φ = 23265408.

The previous prime is 87245497. The next prime is 87245527. The reversal of 87245520 is 2554278.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×87245520² = 15223561520140800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87245527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 181522 + ... + 182001.

Almost surely, 2^87245520 is an apocalyptic number.

87245520 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

87245520 is an abundant number, since it is smaller than the sum of its proper divisors (183216336).

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

87245520 is a wasteful number, since it uses less digits than its factorization.

87245520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 363539 (or 363533 counting only the distinct ones).

The product of its (nonzero) digits is 22400, while the sum is 33.

The square root of 87245520 is about 9340.5310341543. The cubic root of 87245520 is about 443.5211947468.

Adding to 87245520 its reverse (2554278), we get a palindrome (89799798).

The spelling of 87245520 in words is "eighty-seven million, two hundred forty-five thousand, five hundred twenty".