71290330 has 16 divisors (see below), whose sum is σ = 129042720. Its totient is φ = 28356112.

The previous prime is 71290327. The next prime is 71290361. The reversal of 71290330 is 3309217.

It is a super-2 number, since 2×71290330² = 10164622303017800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 71290295 and 71290304.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18124 + ... + 21703.

It is an arithmetic number, because the mean of its divisors is an integer number (8065170).

Almost surely, 2^71290330 is an apocalyptic number.

71290330 is a deficient number, since it is larger than the sum of its proper divisors (57752390).

71290330 is a wasteful number, since it uses less digits than its factorization.

71290330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40013.

The product of its (nonzero) digits is 1134, while the sum is 25.

The square root of 71290330 is about 8443.3601131303. The cubic root of 71290330 is about 414.6454222024.

Adding to 71290330 its reverse (3309217), we get a palindrome (74599547).

The spelling of 71290330 in words is "seventy-one million, two hundred ninety thousand, three hundred thirty".