84722878 has 4 divisors (see below), whose sum is σ = 127084320. Its totient is φ = 42361438.

The previous prime is 84722873. The next prime is 84722899. The reversal of 84722878 is 87822748.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84722873) 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 as a sum of consecutive naturals, namely, 21180718 + ... + 21180721.

It is an arithmetic number, because the mean of its divisors is an integer number (31771080).

Almost surely, 2^84722878 is an apocalyptic number.

84722878 is a deficient number, since it is larger than the sum of its proper divisors (42361442).

84722878 is a wasteful number, since it uses less digits than its factorization.

84722878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42361441.

The product of its digits is 401408, while the sum is 46.

The square root of 84722878 is about 9204.5031370520. The cubic root of 84722878 is about 439.2046202358.

The spelling of 84722878 in words is "eighty-four million, seven hundred twenty-two thousand, eight hundred seventy-eight".