87745540 has 24 divisors (see below), whose sum is σ = 184871232. Its totient is φ = 34982880.

The previous prime is 87745523. The next prime is 87745547. The reversal of 87745540 is 4554778.

It is a junction number, because it is equal to n+sod(n) for n = 87745493 and 87745502.

It is not an unprimeable number, because it can be changed into a prime (87745547) 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, 834 + ... + 13273.

It is an arithmetic number, because the mean of its divisors is an integer number (7702968).

Almost surely, 2^87745540 is an apocalyptic number.

It is an amenable number.

87745540 is an abundant number, since it is smaller than the sum of its proper divisors (97125692).

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

87745540 is a wasteful number, since it uses less digits than its factorization.

87745540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14427 (or 14425 counting only the distinct ones).

The product of its (nonzero) digits is 156800, while the sum is 40.

The square root of 87745540 is about 9367.2589373840. The cubic root of 87745540 is about 444.3668815111.

The spelling of 87745540 in words is "eighty-seven million, seven hundred forty-five thousand, five hundred forty".