87105788 has 48 divisors (see below), whose sum is σ = 194498304. Its totient is φ = 33143040.

The previous prime is 87105757. The next prime is 87105793. The reversal of 87105788 is 88750178.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9956 + ... + 16532.

It is an arithmetic number, because the mean of its divisors is an integer number (4052048).

Almost surely, 2^87105788 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 87105788, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97249152).

87105788 is an abundant number, since it is smaller than the sum of its proper divisors (107392516).

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

87105788 is a wasteful number, since it uses less digits than its factorization.

87105788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6642 (or 6640 counting only the distinct ones).

The product of its (nonzero) digits is 125440, while the sum is 44.

The square root of 87105788 is about 9333.0481623101. The cubic root of 87105788 is about 443.2842877634.

The spelling of 87105788 in words is "eighty-seven million, one hundred five thousand, seven hundred eighty-eight".