85643486 has 4 divisors (see below), whose sum is σ = 128465232. Its totient is φ = 42821742.

The previous prime is 85643473. The next prime is 85643489. The reversal of 85643486 is 68434658.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85643489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21410870 + ... + 21410873.

It is an arithmetic number, because the mean of its divisors is an integer number (32116308).

Almost surely, 2^85643486 is an apocalyptic number.

85643486 is a deficient number, since it is larger than the sum of its proper divisors (42821746).

85643486 is a wasteful number, since it uses less digits than its factorization.

85643486 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42821745.

The product of its digits is 552960, while the sum is 44.

The square root of 85643486 is about 9254.3765862429. The cubic root of 85643486 is about 440.7897078250.

The spelling of 85643486 in words is "eighty-five million, six hundred forty-three thousand, four hundred eighty-six".