71440732 has 48 divisors (see below), whose sum is σ = 145605600. Its totient is φ = 30310400.

The previous prime is 71440729. The next prime is 71440739. The reversal of 71440732 is 23704417.

It is a self number, because there is not a number n which added to its sum of digits gives 71440732.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71440739) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 111132 + ... + 111772.

It is an arithmetic number, because the mean of its divisors is an integer number (3033450).

Almost surely, 2^71440732 is an apocalyptic number.

It is an amenable number.

71440732 is an abundant number, since it is smaller than the sum of its proper divisors (74164868).

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

71440732 is a wasteful number, since it uses less digits than its factorization.

71440732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 822 (or 820 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 28.

The square root of 71440732 is about 8452.2619457752. The cubic root of 71440732 is about 414.9368113983.

The spelling of 71440732 in words is "seventy-one million, four hundred forty thousand, seven hundred thirty-two".