85871638 has 8 divisors (see below), whose sum is σ = 129947688. Its totient is φ = 42555744.

The previous prime is 85871629. The next prime is 85871647. The reversal of 85871638 is 83617858.

It is an interprime number because it is at equal distance from previous prime (85871629) and next prime (85871647).

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

It is a congruent number.

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, 189756 + ... + 190207.

It is an arithmetic number, because the mean of its divisors is an integer number (16243461).

Almost surely, 2^85871638 is an apocalyptic number.

85871638 is a deficient number, since it is larger than the sum of its proper divisors (44076050).

85871638 is a wasteful number, since it uses less digits than its factorization.

85871638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380078.

The product of its digits is 322560, while the sum is 46.

The square root of 85871638 is about 9266.6950958797. The cubic root of 85871638 is about 441.1807781694.

The spelling of 85871638 in words is "eighty-five million, eight hundred seventy-one thousand, six hundred thirty-eight".