71330544 has 100 divisors (see below), whose sum is σ = 215517456. Its totient is φ = 22733568.

The previous prime is 71330513. The next prime is 71330549. The reversal of 71330544 is 44503317.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71330549) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 28612 + ... + 31004.

Almost surely, 2^71330544 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 71330544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (107758728).

71330544 is an abundant number, since it is smaller than the sum of its proper divisors (144186912).

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

71330544 is a wasteful number, since it uses less digits than its factorization.

71330544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2436 (or 2421 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 27.

The square root of 71330544 is about 8445.7411752907. The cubic root of 71330544 is about 414.7233730114.

The spelling of 71330544 in words is "seventy-one million, three hundred thirty thousand, five hundred forty-four".