71489636 has 12 divisors (see below), whose sum is σ = 125904828. Its totient is φ = 35516832.

The previous prime is 71489629. The next prime is 71489653. The reversal of 71489636 is 63698417.

It can be written as a sum of positive squares in 2 ways, for example, as 17172736 + 54316900 = 4144^2 + 7370^2 .

It is a super-2 number, since 2×71489636² = 10221536110824992, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56291 + ... + 57546.

It is an arithmetic number, because the mean of its divisors is an integer number (10492069).

Almost surely, 2^71489636 is an apocalyptic number.

It is an amenable number.

71489636 is a deficient number, since it is larger than the sum of its proper divisors (54415192).

71489636 is a wasteful number, since it uses less digits than its factorization.

71489636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113998 (or 113996 counting only the distinct ones).

The product of its digits is 217728, while the sum is 44.

The square root of 71489636 is about 8455.1544042673. The cubic root of 71489636 is about 415.0314700091.

The spelling of 71489636 in words is "seventy-one million, four hundred eighty-nine thousand, six hundred thirty-six".