87811878 has 96 divisors (see below), whose sum is σ = 227066112. Its totient is φ = 22144320.

The previous prime is 87811819. The next prime is 87811909.

It is a happy number.

87811878 is nontrivially palindromic in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 187801 + ... + 188267.

It is an arithmetic number, because the mean of its divisors is an integer number (2365272).

Almost surely, 2^87811878 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 87811878, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (113533056).

87811878 is an abundant number, since it is smaller than the sum of its proper divisors (139254234).

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

87811878 is a wasteful number, since it uses less digits than its factorization.

87811878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 538 (or 527 counting only the distinct ones).

The product of its digits is 200704, while the sum is 48.

The square root of 87811878 is about 9370.7992188500. The cubic root of 87811878 is about 444.4788377597.

The spelling of 87811878 in words is "eighty-seven million, eight hundred eleven thousand, eight hundred seventy-eight".