87784788 has 96 divisors (see below), whose sum is σ = 265431040. Its totient is φ = 21928320.

The previous prime is 87784747. The next prime is 87784817. The reversal of 87784788 is 88748778.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18633 + ... + 22863.

Almost surely, 2^87784788 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 87784788, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (132715520).

87784788 is an abundant number, since it is smaller than the sum of its proper divisors (177646252).

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

87784788 is a wasteful number, since it uses less digits than its factorization.

87784788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4277 (or 4275 counting only the distinct ones).

The product of its digits is 5619712, while the sum is 57.

The square root of 87784788 is about 9369.3536596715. The cubic root of 87784788 is about 444.4331257580.

The spelling of 87784788 in words is "eighty-seven million, seven hundred eighty-four thousand, seven hundred eighty-eight".