87784812 has 36 divisors (see below), whose sum is σ = 222211080. Its totient is φ = 29220672.

The previous prime is 87784747. The next prime is 87784817. The reversal of 87784812 is 21848778.

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (87784817) 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, 35488 + ... + 37880.

It is an arithmetic number, because the mean of its divisors is an integer number (6172530).

Almost surely, 2^87784812 is an apocalyptic number.

It is an amenable number.

87784812 is an abundant number, since it is smaller than the sum of its proper divisors (134426268).

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

87784812 is a wasteful number, since it uses less digits than its factorization.

87784812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3422 (or 3417 counting only the distinct ones).

The product of its digits is 200704, while the sum is 45.

The square root of 87784812 is about 9369.3549404428. The cubic root of 87784812 is about 444.4331662601.

The spelling of 87784812 in words is "eighty-seven million, seven hundred eighty-four thousand, eight hundred twelve".