84969680 has 20 divisors (see below), whose sum is σ = 197554692. Its totient is φ = 33987840.

The previous prime is 84969679. The next prime is 84969683. The reversal of 84969680 is 8696948.

It can be written as a sum of positive squares in 2 ways, for example, as 53114944 + 31854736 = 7288^2 + 5644^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84969683) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 530981 + ... + 531140.

Almost surely, 2^84969680 is an apocalyptic number.

84969680 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

84969680 is an abundant number, since it is smaller than the sum of its proper divisors (112585012).

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

84969680 is a wasteful number, since it uses less digits than its factorization.

84969680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1062134 (or 1062128 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 50.

The square root of 84969680 is about 9217.8999777607. The cubic root of 84969680 is about 439.6306818316.

The spelling of 84969680 in words is "eighty-four million, nine hundred sixty-nine thousand, six hundred eighty".