85564838 has 4 divisors (see below), whose sum is σ = 128347260. Its totient is φ = 42782418.

The previous prime is 85564837. The next prime is 85564861. The reversal of 85564838 is 83846558.

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

It is a junction number, because it is equal to n+sod(n) for n = 85564792 and 85564801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85564837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21391208 + ... + 21391211.

It is an arithmetic number, because the mean of its divisors is an integer number (32086815).

Almost surely, 2^85564838 is an apocalyptic number.

85564838 is a deficient number, since it is larger than the sum of its proper divisors (42782422).

85564838 is a wasteful number, since it uses less digits than its factorization.

85564838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42782421.

The product of its digits is 921600, while the sum is 47.

The square root of 85564838 is about 9250.1263775151. The cubic root of 85564838 is about 440.6547380496.

The spelling of 85564838 in words is "eighty-five million, five hundred sixty-four thousand, eight hundred thirty-eight".