71838736 has 20 divisors (see below), whose sum is σ = 147375612. Its totient is φ = 33806336.

The previous prime is 71838731. The next prime is 71838751. The reversal of 71838736 is 63783817.

It can be written as a sum of positive squares in 2 ways, for example, as 23619600 + 48219136 = 4860^2 + 6944^2 .

It is a junction number, because it is equal to n+sod(n) for n = 71838692 and 71838701.

It is not an unprimeable number, because it can be changed into a prime (71838731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 131785 + ... + 132328.

Almost surely, 2^71838736 is an apocalyptic number.

It is an amenable number.

71838736 is an abundant number, since it is smaller than the sum of its proper divisors (75536876).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

71838736 is a wasteful number, since it uses less digits than its factorization.

71838736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264138 (or 264132 counting only the distinct ones).

The product of its digits is 169344, while the sum is 43.

The square root of 71838736 is about 8475.7734750287. The cubic root of 71838736 is about 415.7059373986.

The spelling of 71838736 in words is "seventy-one million, eight hundred thirty-eight thousand, seven hundred thirty-six".