71330432 has 16 divisors (see below), whose sum is σ = 142103850. Its totient is φ = 35665152.

The previous prime is 71330423. The next prime is 71330513. The reversal of 71330432 is 23403317.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 64899136 + 6431296 = 8056^2 + 2536^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is a junction number, because it is equal to n+sod(n) for n = 71330398 and 71330407.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 278507 + ... + 278762.

Almost surely, 2^71330432 is an apocalyptic number.

It is an amenable number.

71330432 is a deficient number, since it is larger than the sum of its proper divisors (70773418).

71330432 is an equidigital number, since it uses as much as digits as its factorization.

71330432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 557283 (or 557271 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 23.

The square root of 71330432 is about 8445.7345447273. The cubic root of 71330432 is about 414.7231559513.

Adding to 71330432 its reverse (23403317), we get a palindrome (94733749).

The spelling of 71330432 in words is "seventy-one million, three hundred thirty thousand, four hundred thirty-two".