71040000 has 220 divisors, whose sum is σ = 243003464. Its totient is φ = 18432000.

The previous prime is 71039977. The next prime is 71040001. The reversal of 71040000 is 4017.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71040001) 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, 1919982 + ... + 1920018.

Almost surely, 2^71040000 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 71040000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (121501732).

71040000 is an abundant number, since it is smaller than the sum of its proper divisors (171963464).

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

71040000 is an equidigital number, since it uses as much as digits as its factorization.

71040000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80 (or 47 counting only the distinct ones).

The product of its (nonzero) digits is 28, while the sum is 12.

The square root of 71040000 is about 8428.5230022822. The cubic root of 71040000 is about 414.1595221794.

Adding to 71040000 its reverse (4017), we get a palindrome (71044017).

The spelling of 71040000 in words is "seventy-one million, forty thousand".