85871438 has 4 divisors (see below), whose sum is σ = 128807160. Its totient is φ = 42935718.

The previous prime is 85871419. The next prime is 85871441. The reversal of 85871438 is 83417858.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21467858 + ... + 21467861.

It is an arithmetic number, because the mean of its divisors is an integer number (32201790).

Almost surely, 2^85871438 is an apocalyptic number.

85871438 is a deficient number, since it is larger than the sum of its proper divisors (42935722).

85871438 is a wasteful number, since it uses less digits than its factorization.

85871438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42935721.

The product of its digits is 215040, while the sum is 44.

The square root of 85871438 is about 9266.6843045396. The cubic root of 85871438 is about 441.1804356573.

The spelling of 85871438 in words is "eighty-five million, eight hundred seventy-one thousand, four hundred thirty-eight".