84869856 has 120 divisors (see below), whose sum is σ = 252473760. Its totient is φ = 27965952.

The previous prime is 84869833. The next prime is 84869857. The reversal of 84869856 is 65896848.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84869857) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 354985 + ... + 355223.

It is an arithmetic number, because the mean of its divisors is an integer number (2103948).

Almost surely, 2^84869856 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 84869856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (126236880).

84869856 is an abundant number, since it is smaller than the sum of its proper divisors (167603904).

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

84869856 is a wasteful number, since it uses less digits than its factorization.

84869856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 398 (or 381 counting only the distinct ones).

The product of its digits is 3317760, while the sum is 54.

The square root of 84869856 is about 9212.4837041918. The cubic root of 84869856 is about 439.4584521989.

The spelling of 84869856 in words is "eighty-four million, eight hundred sixty-nine thousand, eight hundred fifty-six".