71735140 has 12 divisors (see below), whose sum is σ = 150643836. Its totient is φ = 28694048.

The previous prime is 71735107. The next prime is 71735143. The reversal of 71735140 is 4153717.

It can be written as a sum of positive squares in 2 ways, for example, as 12013156 + 59721984 = 3466^2 + 7728^2 .

It is a junction number, because it is equal to n+sod(n) for n = 71735099 and 71735108.

It is not an unprimeable number, because it can be changed into a prime (71735143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1793359 + ... + 1793398.

It is an arithmetic number, because the mean of its divisors is an integer number (12553653).

Almost surely, 2^71735140 is an apocalyptic number.

It is an amenable number.

71735140 is an abundant number, since it is smaller than the sum of its proper divisors (78908696).

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

71735140 is a wasteful number, since it uses less digits than its factorization.

71735140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3586766 (or 3586764 counting only the distinct ones).

The product of its (nonzero) digits is 2940, while the sum is 28.

The square root of 71735140 is about 8469.6599695619. The cubic root of 71735140 is about 415.5060165187.

Adding to 71735140 its reverse (4153717), we get a palindrome (75888857).

The spelling of 71735140 in words is "seventy-one million, seven hundred thirty-five thousand, one hundred forty".