71608240 has 40 divisors (see below), whose sum is σ = 181626768. Its totient is φ = 26039040.

The previous prime is 71608237. The next prime is 71608253. The reversal of 71608240 is 4280617.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 71608199 and 71608208.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39807 + ... + 41566.

Almost surely, 2^71608240 is an apocalyptic number.

It is an amenable number.

71608240 is an abundant number, since it is smaller than the sum of its proper divisors (110018528).

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

71608240 is a wasteful number, since it uses less digits than its factorization.

71608240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81397 (or 81391 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 71608240 is about 8462.1652075577. The cubic root of 71608240 is about 415.2608608159.

Adding to 71608240 its reverse (4280617), we get a palindrome (75888857).

It can be divided in two parts, 7160 and 8240, that added together give a triangular number (15400 = T₁₇₅).

The spelling of 71608240 in words is "seventy-one million, six hundred eight thousand, two hundred forty".