71006780 has 48 divisors (see below), whose sum is σ = 162664320. Its totient is φ = 25878528.

The previous prime is 71006759. The next prime is 71006783. The reversal of 71006780 is 8760017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71006783) 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, 18812 + ... + 22268.

It is an arithmetic number, because the mean of its divisors is an integer number (3388840).

Almost surely, 2^71006780 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 71006780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81332160).

71006780 is an abundant number, since it is smaller than the sum of its proper divisors (91657540).

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

71006780 is a wasteful number, since it uses less digits than its factorization.

71006780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3558 (or 3556 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 29.

The square root of 71006780 is about 8426.5520825543. The cubic root of 71006780 is about 414.0949551539.

Adding to 71006780 its reverse (8760017), we get a palindrome (79766797).

The spelling of 71006780 in words is "seventy-one million, six thousand, seven hundred eighty".