71085244 has 24 divisors (see below), whose sum is σ = 128314368. Its totient is φ = 34439280.

The previous prime is 71085241. The next prime is 71085253. The reversal of 71085244 is 44258017.

It is a super-2 number, since 2×71085244² = 10106223829079072, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71085241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17529 + ... + 21199.

It is an arithmetic number, because the mean of its divisors is an integer number (5346432).

Almost surely, 2^71085244 is an apocalyptic number.

It is an amenable number.

71085244 is a deficient number, since it is larger than the sum of its proper divisors (57229124).

71085244 is a wasteful number, since it uses less digits than its factorization.

71085244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3825 (or 3823 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 31.

The square root of 71085244 is about 8431.2065565967. The cubic root of 71085244 is about 414.2474269130.

The spelling of 71085244 in words is "seventy-one million, eighty-five thousand, two hundred forty-four".