87816870 has 24 divisors (see below), whose sum is σ = 228324096. Its totient is φ = 23417808.

The previous prime is 87816857. The next prime is 87816871. The reversal of 87816870 is 7861878.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87816871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 487782 + ... + 487961.

It is an arithmetic number, because the mean of its divisors is an integer number (9513504).

Almost surely, 2^87816870 is an apocalyptic number.

87816870 is an abundant number, since it is smaller than the sum of its proper divisors (140507226).

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

87816870 is a wasteful number, since it uses less digits than its factorization.

87816870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 975756 (or 975753 counting only the distinct ones).

The product of its (nonzero) digits is 150528, while the sum is 45.

The square root of 87816870 is about 9371.0655744158. The cubic root of 87816870 is about 444.4872602965.

It can be divided in two parts, 8781 and 6870, that added together give a palindrome (15651).

The spelling of 87816870 in words is "eighty-seven million, eight hundred sixteen thousand, eight hundred seventy".