85639704 has 24 divisors (see below), whose sum is σ = 214212660. Its totient is φ = 28531456.

The previous prime is 85639691. The next prime is 85639717. The reversal of 85639704 is 40793658.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (85639691) and next prime (85639717).

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 44392 + ... + 46280.

Almost surely, 2^85639704 is an apocalyptic number.

It is an amenable number.

85639704 is an abundant number, since it is smaller than the sum of its proper divisors (128572956).

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

85639704 is an equidigital number, since it uses as much as digits as its factorization.

85639704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3787 (or 1894 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 42.

The square root of 85639704 is about 9254.1722482348. The cubic root of 85639704 is about 440.7832193330.

The spelling of 85639704 in words is "eighty-five million, six hundred thirty-nine thousand, seven hundred four".