87867856 has 20 divisors (see below), whose sum is σ = 179204800. Its totient is φ = 41621472.

The previous prime is 87867851. The next prime is 87867869. The reversal of 87867856 is 65876878.

It is a junction number, because it is equal to n+sod(n) for n = 87867797 and 87867806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87867851) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 144216 + ... + 144823.

It is an arithmetic number, because the mean of its divisors is an integer number (8960240).

Almost surely, 2^87867856 is an apocalyptic number.

It is an amenable number.

87867856 is an abundant number, since it is smaller than the sum of its proper divisors (91336944).

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

87867856 is a wasteful number, since it uses less digits than its factorization.

87867856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289066 (or 289060 counting only the distinct ones).

The product of its digits is 4515840, while the sum is 55.

The square root of 87867856 is about 9373.7855746758. The cubic root of 87867856 is about 444.5732659540.

The spelling of 87867856 in words is "eighty-seven million, eight hundred sixty-seven thousand, eight hundred fifty-six".