82185890 has 8 divisors (see below), whose sum is σ = 147934620. Its totient is φ = 32874352.

The previous prime is 82185841. The next prime is 82185911. The reversal of 82185890 is 9858128.

It can be written as a sum of positive squares in 2 ways, for example, as 82065481 + 120409 = 9059^2 + 347^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4109285 + ... + 4109304.

Almost surely, 2^82185890 is an apocalyptic number.

82185890 is a deficient number, since it is larger than the sum of its proper divisors (65748730).

82185890 is a wasteful number, since it uses less digits than its factorization.

82185890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8218596.

The product of its (nonzero) digits is 46080, while the sum is 41.

The square root of 82185890 is about 9065.6433858828. The cubic root of 82185890 is about 434.7761917357.

The spelling of 82185890 in words is "eighty-two million, one hundred eighty-five thousand, eight hundred ninety".