83813870 has 32 divisors (see below), whose sum is σ = 173071296. Its totient is φ = 28627200.

The previous prime is 83813869. The next prime is 83813887. The reversal of 83813870 is 7831838.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17540 + ... + 21800.

It is an arithmetic number, because the mean of its divisors is an integer number (5408478).

Almost surely, 2^83813870 is an apocalyptic number.

83813870 is an abundant number, since it is smaller than the sum of its proper divisors (89257426).

83813870 is a wasteful number, since it uses less digits than its factorization.

83813870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4556.

The product of its (nonzero) digits is 32256, while the sum is 38.

The square root of 83813870 is about 9154.9915346766. The cubic root of 83813870 is about 437.6281986214.

The spelling of 83813870 in words is "eighty-three million, eight hundred thirteen thousand, eight hundred seventy".