85724216 has 8 divisors (see below), whose sum is σ = 160732920. Its totient is φ = 42862104.

The previous prime is 85724201. The next prime is 85724237. The reversal of 85724216 is 61242758.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5357756 + ... + 5357771.

It is an arithmetic number, because the mean of its divisors is an integer number (20091615).

Almost surely, 2^85724216 is an apocalyptic number.

It is an amenable number.

85724216 is a deficient number, since it is larger than the sum of its proper divisors (75008704).

85724216 is a wasteful number, since it uses less digits than its factorization.

85724216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10715533 (or 10715529 counting only the distinct ones).

The product of its digits is 26880, while the sum is 35.

The square root of 85724216 is about 9258.7372789166. The cubic root of 85724216 is about 440.9281646592.

The spelling of 85724216 in words is "eighty-five million, seven hundred twenty-four thousand, two hundred sixteen".