71147320 has 16 divisors (see below), whose sum is σ = 160081560. Its totient is φ = 28458912.

The previous prime is 71147317. The next prime is 71147339. The reversal of 71147320 is 2374117.

It is a happy number.

It is a super-2 number, since 2×71147320² = 10123882286364800, which contains 22 as substring.

It is a congruent number.

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, 889302 + ... + 889381.

Almost surely, 2^71147320 is an apocalyptic number.

It is an amenable number.

71147320 is an abundant number, since it is smaller than the sum of its proper divisors (88934240).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

71147320 is a wasteful number, since it uses less digits than its factorization.

71147320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1778694 (or 1778690 counting only the distinct ones).

The product of its (nonzero) digits is 1176, while the sum is 25.

The square root of 71147320 is about 8434.8870768968. The cubic root of 71147320 is about 414.3679739267.

The spelling of 71147320 in words is "seventy-one million, one hundred forty-seven thousand, three hundred twenty".