83870 has 8 divisors (see below), whose sum is σ = 150984. Its totient is φ = 33544.

The previous prime is 83869. The next prime is 83873. The reversal of 83870 is 7838.

83870 = 55² + 56² + ... + 74².

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

It is an alternating number because its digits alternate between even and odd.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83873) 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, 4184 + ... + 4203.

It is an arithmetic number, because the mean of its divisors is an integer number (18873).

2⁸³⁸⁷⁰ is an apocalyptic number.

83870 is a deficient number, since it is larger than the sum of its proper divisors (67114).

83870 is a wasteful number, since it uses less digits than its factorization.

83870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8394.

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 83870 is about 289.6031767782. The cubic root of 83870 is about 43.7725869764.

The spelling of 83870 in words is "eighty-three thousand, eight hundred seventy".