71872072 has 16 divisors (see below), whose sum is σ = 134898300. Its totient is φ = 35899200.

The previous prime is 71872069. The next prime is 71872103. The reversal of 71872072 is 27027817.

It can be written as a sum of positive squares in 2 ways, for example, as 71673156 + 198916 = 8466^2 + 446^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4822 + ... + 12922.

Almost surely, 2^71872072 is an apocalyptic number.

It is an amenable number.

71872072 is a deficient number, since it is larger than the sum of its proper divisors (63026228).

71872072 is a wasteful number, since it uses less digits than its factorization.

71872072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9216 (or 9212 counting only the distinct ones).

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

The square root of 71872072 is about 8477.7397931288. The cubic root of 71872072 is about 415.7702287587.

Adding to 71872072 its reverse (27027817), we get a palindrome (98899889).

The spelling of 71872072 in words is "seventy-one million, eight hundred seventy-two thousand, seventy-two".