85650138 has 108 divisors (see below), whose sum is σ = 228680010. Its totient is φ = 23097312.

The previous prime is 85650113. The next prime is 85650139. The reversal of 85650138 is 83105658.

It can be written as a sum of positive squares in only one way, i.e., 84217329 + 1432809 = 9177^2 + 1197^2 .

It is a super-2 number, since 2×85650138² = 14671892278838088, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (85650139) by changing a digit.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 318268 + ... + 318536.

Almost surely, 2^85650138 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 85650138, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (114340005).

85650138 is an abundant number, since it is smaller than the sum of its proper divisors (143029872).

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

85650138 is a wasteful number, since it uses less digits than its factorization.

85650138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 329 (or 300 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 36.

The square root of 85650138 is about 9254.7359767851. The cubic root of 85650138 is about 440.8011196959.

The spelling of 85650138 in words is "eighty-five million, six hundred fifty thousand, one hundred thirty-eight".