71297616 has 40 divisors (see below), whose sum is σ = 198355360. Its totient is φ = 21937536.

The previous prime is 71297599. The next prime is 71297623. The reversal of 71297616 is 61679217.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56506 + ... + 57753.

It is an arithmetic number, because the mean of its divisors is an integer number (4958884).

Almost surely, 2^71297616 is an apocalyptic number.

It is an amenable number.

71297616 is an abundant number, since it is smaller than the sum of its proper divisors (127057744).

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

71297616 is a wasteful number, since it uses less digits than its factorization.

71297616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114283 (or 114277 counting only the distinct ones).

The product of its digits is 31752, while the sum is 39.

The square root of 71297616 is about 8443.7915654047. The cubic root of 71297616 is about 414.6595475573.

The spelling of 71297616 in words is "seventy-one million, two hundred ninety-seven thousand, six hundred sixteen".