71234644 has 12 divisors (see below), whose sum is σ = 134250004. Its totient is φ = 32877504.

The previous prime is 71234633. The next prime is 71234651. The reversal of 71234644 is 44643217.

It can be written as a sum of positive squares in 2 ways, for example, as 8191044 + 63043600 = 2862^2 + 7940^2 .

It is a congruent number.

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, 684897 + ... + 685000.

Almost surely, 2^71234644 is an apocalyptic number.

It is an amenable number.

71234644 is a deficient number, since it is larger than the sum of its proper divisors (63015360).

71234644 is a wasteful number, since it uses less digits than its factorization.

71234644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1369914 (or 1369912 counting only the distinct ones).

The product of its digits is 16128, while the sum is 31.

The square root of 71234644 is about 8440.0618481146. The cubic root of 71234644 is about 414.5374320558.

The spelling of 71234644 in words is "seventy-one million, two hundred thirty-four thousand, six hundred forty-four".