87240560 has 40 divisors (see below), whose sum is σ = 221276016. Its totient is φ = 31723520.

The previous prime is 87240557. The next prime is 87240563. The reversal of 87240560 is 6504278.

It is an interprime number because it is at equal distance from previous prime (87240557) and next prime (87240563).

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

It is a super-2 number, since 2×87240560² = 15221830618227200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87240563) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48689 + ... + 50448.

Almost surely, 2^87240560 is an apocalyptic number.

87240560 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

87240560 is an abundant number, since it is smaller than the sum of its proper divisors (134035456).

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

87240560 is a wasteful number, since it uses less digits than its factorization.

87240560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99161 (or 99155 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 32.

The square root of 87240560 is about 9340.2655208511. The cubic root of 87240560 is about 443.5127897047.

The spelling of 87240560 in words is "eighty-seven million, two hundred forty thousand, five hundred sixty".