84878992 has 80 divisors (see below), whose sum is σ = 189702144. Its totient is φ = 36432000.

The previous prime is 84878987. The next prime is 84879001. The reversal of 84878992 is 29987848.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 256267 + ... + 256597.

Almost surely, 2^84878992 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 84878992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94851072).

84878992 is an abundant number, since it is smaller than the sum of its proper divisors (104823152).

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

84878992 is a wasteful number, since it uses less digits than its factorization.

84878992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 428 (or 422 counting only the distinct ones).

The product of its digits is 2322432, while the sum is 55.

The square root of 84878992 is about 9212.9795397580. The cubic root of 84878992 is about 439.4742204530.

It can be divided in two parts, 84878 and 992, that multiplied together give a square (84198976 = 9176²).

The spelling of 84878992 in words is "eighty-four million, eight hundred seventy-eight thousand, nine hundred ninety-two".