84890 has 16 divisors (see below), whose sum is σ = 164808. Its totient is φ = 31296.

The previous prime is 84871. The next prime is 84913. The reversal of 84890 is 9848.

It can be written as a sum of positive squares in 4 ways, for example, as 41209 + 43681 = 203^2 + 209^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 197 + ... + 456.

2⁸⁴⁸⁹⁰ is an apocalyptic number.

84890 is a deficient number, since it is larger than the sum of its proper divisors (79918).

84890 is a wasteful number, since it uses less digits than its factorization.

84890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 673.

The product of its (nonzero) digits is 2304, while the sum is 29.

The square root of 84890 is about 291.3588852258. The cubic root of 84890 is about 43.9493218177.

The spelling of 84890 in words is "eighty-four thousand, eight hundred ninety".