71218464 has 24 divisors (see below), whose sum is σ = 186948720. Its totient is φ = 23739456.

The previous prime is 71218453. The next prime is 71218481. The reversal of 71218464 is 46481217.

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×71218464² = 10144139229038592, which contains 22 as substring.

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, 370834 + ... + 371025.

It is an arithmetic number, because the mean of its divisors is an integer number (7789530).

Almost surely, 2^71218464 is an apocalyptic number.

It is an amenable number.

71218464 is an abundant number, since it is smaller than the sum of its proper divisors (115730256).

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

71218464 is a wasteful number, since it uses less digits than its factorization.

71218464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 741872 (or 741864 counting only the distinct ones).

The product of its digits is 10752, while the sum is 33.

The square root of 71218464 is about 8439.1032698978. The cubic root of 71218464 is about 414.5060441283.

The spelling of 71218464 in words is "seventy-one million, two hundred eighteen thousand, four hundred sixty-four".