84778888870 has 48 divisors (see below), whose sum is σ = 165489901200. Its totient is φ = 31256314752.

The previous prime is 84778888867. The next prime is 84778888879. The reversal of 84778888870 is 7888887748.

It is a junction number, because it is equal to n+sod(n) for n = 84778888793 and 84778888802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84778888879) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1107081 + ... + 1181179.

It is an arithmetic number, because the mean of its divisors is an integer number (3447706275).

Almost surely, 2^84778888870 is an apocalyptic number.

84778888870 is a deficient number, since it is larger than the sum of its proper divisors (80711012330).

84778888870 is a wasteful number, since it uses less digits than its factorization.

84778888870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74809 (or 74796 counting only the distinct ones).

The product of its (nonzero) digits is 359661568, while the sum is 73.

The spelling of 84778888870 in words is "eighty-four billion, seven hundred seventy-eight million, eight hundred eighty-eight thousand, eight hundred seventy".