82173858 has 16 divisors (see below), whose sum is σ = 176990016. Its totient is φ = 25284240.

The previous prime is 82173857. The next prime is 82173859. The reversal of 82173858 is 85837128.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (82173857) and next prime (82173859).

It is not an unprimeable number, because it can be changed into a prime (82173857) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 526678 + ... + 526833.

It is an arithmetic number, because the mean of its divisors is an integer number (11061876).

Almost surely, 2^82173858 is an apocalyptic number.

82173858 is an abundant number, since it is smaller than the sum of its proper divisors (94816158).

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

82173858 is a wasteful number, since it uses less digits than its factorization.

82173858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1053529.

The product of its digits is 107520, while the sum is 42.

The square root of 82173858 is about 9064.9797572857. The cubic root of 82173858 is about 434.7549736473.

The spelling of 82173858 in words is "eighty-two million, one hundred seventy-three thousand, eight hundred fifty-eight".