84812778 has 16 divisors (see below), whose sum is σ = 188472960. Its totient is φ = 28270908.

The previous prime is 84812771. The next prime is 84812797. The reversal of 84812778 is 87721848.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (84812771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 785250 + ... + 785357.

It is an arithmetic number, because the mean of its divisors is an integer number (11779560).

Almost surely, 2^84812778 is an apocalyptic number.

84812778 is an abundant number, since it is smaller than the sum of its proper divisors (103660182).

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

84812778 is a wasteful number, since it uses less digits than its factorization.

84812778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1570618 (or 1570612 counting only the distinct ones).

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

The square root of 84812778 is about 9209.3853215076. The cubic root of 84812778 is about 439.3599129531.

The spelling of 84812778 in words is "eighty-four million, eight hundred twelve thousand, seven hundred seventy-eight".