85667538 has 16 divisors (see below), whose sum is σ = 186911136. Its totient is φ = 25959840.

The previous prime is 85667531. The next prime is 85667551. The reversal of 85667538 is 83576658.

It is not an unprimeable number, because it can be changed into a prime (85667531) 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, 648931 + ... + 649062.

It is an arithmetic number, because the mean of its divisors is an integer number (11681946).

Almost surely, 2^85667538 is an apocalyptic number.

85667538 is an abundant number, since it is smaller than the sum of its proper divisors (101243598).

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

85667538 is a wasteful number, since it uses less digits than its factorization.

85667538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1298009.

The product of its digits is 1209600, while the sum is 48.

The square root of 85667538 is about 9255.6759882788. The cubic root of 85667538 is about 440.8309675566.

The spelling of 85667538 in words is "eighty-five million, six hundred sixty-seven thousand, five hundred thirty-eight".