71288330 has 8 divisors (see below), whose sum is σ = 128319012. Its totient is φ = 28515328.

The previous prime is 71288317. The next prime is 71288333. The reversal of 71288330 is 3388217.

It can be written as a sum of positive squares in 2 ways, for example, as 65723449 + 5564881 = 8107^2 + 2359^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (71288333) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 3564407 + ... + 3564426.

Almost surely, 2^71288330 is an apocalyptic number.

71288330 is a deficient number, since it is larger than the sum of its proper divisors (57030682).

71288330 is a wasteful number, since it uses less digits than its factorization.

71288330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7128840.

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 71288330 is about 8443.2416760389. The cubic root of 71288330 is about 414.6415446377.

The spelling of 71288330 in words is "seventy-one million, two hundred eighty-eight thousand, three hundred thirty".