71733240 has 96 divisors (see below), whose sum is σ = 241207200. Its totient is φ = 18466560.

The previous prime is 71733229. The next prime is 71733247. The reversal of 71733240 is 4233717.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71733247) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7005 + ... + 13875.

It is an arithmetic number, because the mean of its divisors is an integer number (2512575).

Almost surely, 2^71733240 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71733240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (120603600).

71733240 is an abundant number, since it is smaller than the sum of its proper divisors (169473960).

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

71733240 is a wasteful number, since it uses less digits than its factorization.

71733240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6917 (or 6910 counting only the distinct ones).

The product of its (nonzero) digits is 3528, while the sum is 27.

The square root of 71733240 is about 8469.5478037496. The cubic root of 71733240 is about 415.5023480776.

Adding to 71733240 its reverse (4233717), we get a palindrome (75966957).

The spelling of 71733240 in words is "seventy-one million, seven hundred thirty-three thousand, two hundred forty".