87785540 has 24 divisors (see below), whose sum is σ = 184696512. Its totient is φ = 35048160.

The previous prime is 87785507. The next prime is 87785557. The reversal of 87785540 is 4558778.

It is a junction number, because it is equal to n+sod(n) for n = 87785491 and 87785500.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7577 + ... + 15263.

It is an arithmetic number, because the mean of its divisors is an integer number (7695688).

Almost surely, 2^87785540 is an apocalyptic number.

It is an amenable number.

87785540 is an abundant number, since it is smaller than the sum of its proper divisors (96910972).

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

87785540 is a wasteful number, since it uses less digits than its factorization.

87785540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8267 (or 8265 counting only the distinct ones).

The product of its (nonzero) digits is 313600, while the sum is 44.

The square root of 87785540 is about 9369.3937904221. The cubic root of 87785540 is about 444.4343948191.

The spelling of 87785540 in words is "eighty-seven million, seven hundred eighty-five thousand, five hundred forty".