71307472 has 20 divisors (see below), whose sum is σ = 140766660. Its totient is φ = 34980608.

The previous prime is 71307463. The next prime is 71307479. The reversal of 71307472 is 27470317.

It can be written as a sum of positive squares in 2 ways, for example, as 48497296 + 22810176 = 6964^2 + 4776^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71307479) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41197 + ... + 42892.

It is an arithmetic number, because the mean of its divisors is an integer number (7038333).

Almost surely, 2^71307472 is an apocalyptic number.

It is an amenable number.

71307472 is a deficient number, since it is larger than the sum of its proper divisors (69459188).

71307472 is a wasteful number, since it uses less digits than its factorization.

71307472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84150 (or 84144 counting only the distinct ones).

The product of its (nonzero) digits is 8232, while the sum is 31.

The square root of 71307472 is about 8444.3751693065. The cubic root of 71307472 is about 414.6786538352.

Adding to 71307472 its reverse (27470317), we get a palindrome (98777789).

The spelling of 71307472 in words is "seventy-one million, three hundred seven thousand, four hundred seventy-two".