85709672 has 8 divisors (see below), whose sum is σ = 160705650. Its totient is φ = 42854832.

The previous prime is 85709669. The next prime is 85709693. The reversal of 85709672 is 27690758.

It can be written as a sum of positive squares in only one way, i.e., 77334436 + 8375236 = 8794^2 + 2894^2 .

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

It is a super-2 number, since 2×85709672² = 14692295748695168, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5356847 + ... + 5356862.

Almost surely, 2^85709672 is an apocalyptic number.

It is an amenable number.

85709672 is a deficient number, since it is larger than the sum of its proper divisors (74995978).

85709672 is a wasteful number, since it uses less digits than its factorization.

85709672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10713715 (or 10713711 counting only the distinct ones).

The product of its (nonzero) digits is 211680, while the sum is 44.

The square root of 85709672 is about 9257.9518253229. The cubic root of 85709672 is about 440.9032272408.

The spelling of 85709672 in words is "eighty-five million, seven hundred nine thousand, six hundred seventy-two".