71272780 has 24 divisors (see below), whose sum is σ = 150116400. Its totient is φ = 28424640.

The previous prime is 71272769. The next prime is 71272793. The reversal of 71272780 is 8727217.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1875 + ... + 12085.

It is an arithmetic number, because the mean of its divisors is an integer number (6254850).

Almost surely, 2^71272780 is an apocalyptic number.

It is an amenable number.

71272780 is an abundant number, since it is smaller than the sum of its proper divisors (78843620).

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

71272780 is a wasteful number, since it uses less digits than its factorization.

71272780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10569 (or 10567 counting only the distinct ones).

The product of its (nonzero) digits is 10976, while the sum is 34.

The square root of 71272780 is about 8442.3207709729. The cubic root of 71272780 is about 414.6113940980.

Adding to 71272780 its reverse (8727217), we get a palindrome (79999997).

The spelling of 71272780 in words is "seventy-one million, two hundred seventy-two thousand, seven hundred eighty".