84890320 has 20 divisors (see below), whose sum is σ = 197370180. Its totient is φ = 33956096.

The previous prime is 84890317. The next prime is 84890327. The reversal of 84890320 is 2309848.

It can be written as a sum of positive squares in 2 ways, for example, as 62346816 + 22543504 = 7896^2 + 4748^2 .

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 (84890327) 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, 530485 + ... + 530644.

It is an arithmetic number, because the mean of its divisors is an integer number (9868509).

Almost surely, 2^84890320 is an apocalyptic number.

84890320 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

84890320 is an abundant number, since it is smaller than the sum of its proper divisors (112479860).

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

84890320 is a wasteful number, since it uses less digits than its factorization.

84890320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1061142 (or 1061136 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 84890320 is about 9213.5943040705. The cubic root of 84890320 is about 439.4937704123.

The spelling of 84890320 in words is "eighty-four million, eight hundred ninety thousand, three hundred twenty".