85640842 has 8 divisors (see below), whose sum is σ = 146812896. Its totient is φ = 36703212.

The previous prime is 85640837. The next prime is 85640843. The reversal of 85640842 is 24804658.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (85640843) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3058588 + ... + 3058615.

It is an arithmetic number, because the mean of its divisors is an integer number (18351612).

Almost surely, 2^85640842 is an apocalyptic number.

85640842 is a deficient number, since it is larger than the sum of its proper divisors (61172054).

85640842 is a wasteful number, since it uses less digits than its factorization.

85640842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6117212.

The product of its (nonzero) digits is 61440, while the sum is 37.

The square root of 85640842 is about 9254.2337338107. The cubic root of 85640842 is about 440.7851717338.

The spelling of 85640842 in words is "eighty-five million, six hundred forty thousand, eight hundred forty-two".