87867855 has 16 divisors (see below), whose sum is σ = 156209760. Its totient is φ = 46862784.

The previous prime is 87867851. The next prime is 87867869. The reversal of 87867855 is 55876878.

It is a happy number.

It is not a de Polignac number, because 87867855 - 2² = 87867851 is a prime.

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 15 ways as a sum of consecutive naturals, for example, 325302 + ... + 325571.

It is an arithmetic number, because the mean of its divisors is an integer number (9763110).

Almost surely, 2^87867855 is an apocalyptic number.

87867855 is a deficient number, since it is larger than the sum of its proper divisors (68341905).

87867855 is a wasteful number, since it uses less digits than its factorization.

87867855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 650887 (or 650881 counting only the distinct ones).

The product of its digits is 3763200, while the sum is 54.

The square root of 87867855 is about 9373.7855213356. The cubic root of 87867855 is about 444.5732642675.

It can be divided in two parts, 8786 and 7855, that added together give a square (16641 = 129²).

The spelling of 87867855 in words is "eighty-seven million, eight hundred sixty-seven thousand, eight hundred fifty-five".