71713240 has 32 divisors (see below), whose sum is σ = 164404080. Its totient is φ = 28143232.

The previous prime is 71713231. The next prime is 71713321. The reversal of 71713240 is 4231717.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14794 + ... + 19033.

Almost surely, 2^71713240 is an apocalyptic number.

It is an amenable number.

71713240 is an abundant number, since it is smaller than the sum of its proper divisors (92690840).

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

71713240 is a wasteful number, since it uses less digits than its factorization.

71713240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33891 (or 33887 counting only the distinct ones).

The product of its (nonzero) digits is 1176, while the sum is 25.

The square root of 71713240 is about 8468.3670208606. The cubic root of 71713240 is about 415.4637289782.

Adding to 71713240 its reverse (4231717), we get a palindrome (75944957).

The spelling of 71713240 in words is "seventy-one million, seven hundred thirteen thousand, two hundred forty".