87816894 has 16 divisors (see below), whose sum is σ = 191600640. Its totient is φ = 26611160.

The previous prime is 87816889. The next prime is 87816899. The reversal of 87816894 is 49861878.

It is an interprime number because it is at equal distance from previous prime (87816889) and next prime (87816899).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87816899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 665214 + ... + 665345.

It is an arithmetic number, because the mean of its divisors is an integer number (11975040).

Almost surely, 2^87816894 is an apocalyptic number.

87816894 is an abundant number, since it is smaller than the sum of its proper divisors (103783746).

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

87816894 is a wasteful number, since it uses less digits than its factorization.

87816894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1330575.

The product of its digits is 774144, while the sum is 51.

The square root of 87816894 is about 9371.0668549531. The cubic root of 87816894 is about 444.4873007887.

The spelling of 87816894 in words is "eighty-seven million, eight hundred sixteen thousand, eight hundred ninety-four".