87855016 has 8 divisors (see below), whose sum is σ = 164728170. Its totient is φ = 43927504.

The previous prime is 87855011. The next prime is 87855037. The reversal of 87855016 is 61055878.

It can be written as a sum of positive squares in only one way, i.e., 76632516 + 11222500 = 8754^2 + 3350^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 87855016.

It is not an unprimeable number, because it can be changed into a prime (87855011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5490931 + ... + 5490946.

Almost surely, 2^87855016 is an apocalyptic number.

It is an amenable number.

87855016 is a deficient number, since it is larger than the sum of its proper divisors (76873154).

87855016 is a wasteful number, since it uses less digits than its factorization.

87855016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10981883 (or 10981879 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 40.

The square root of 87855016 is about 9373.1006609339. The cubic root of 87855016 is about 444.5516099542.

The spelling of 87855016 in words is "eighty-seven million, eight hundred fifty-five thousand, sixteen".