84878840 has 32 divisors (see below), whose sum is σ = 191268000. Its totient is φ = 33899904.

The previous prime is 84878831. The next prime is 84878863. The reversal of 84878840 is 4887848.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35606 + ... + 37914.

It is an arithmetic number, because the mean of its divisors is an integer number (5977125).

Almost surely, 2^84878840 is an apocalyptic number.

It is an amenable number.

84878840 is an abundant number, since it is smaller than the sum of its proper divisors (106389160).

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

84878840 is a wasteful number, since it uses less digits than its factorization.

84878840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3239 (or 3235 counting only the distinct ones).

The product of its (nonzero) digits is 458752, while the sum is 47.

The square root of 84878840 is about 9212.9712905229. The cubic root of 84878840 is about 439.4739581183.

The spelling of 84878840 in words is "eighty-four million, eight hundred seventy-eight thousand, eight hundred forty".