71818416 has 30 divisors (see below), whose sum is σ = 200992220. Its totient is φ = 23939424.

The previous prime is 71818391. The next prime is 71818441. The reversal of 71818416 is 61481817.

It is an interprime number because it is at equal distance from previous prime (71818391) and next prime (71818441).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 249226 + ... + 249513.

Almost surely, 2^71818416 is an apocalyptic number.

It is an amenable number.

71818416 is an abundant number, since it is smaller than the sum of its proper divisors (129173804).

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

71818416 is a wasteful number, since it uses less digits than its factorization.

71818416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 498753 (or 498744 counting only the distinct ones).

The product of its digits is 10752, while the sum is 36.

The square root of 71818416 is about 8474.5746795931. The cubic root of 71818416 is about 415.6667387634. Note that the first 3 decimals are identical.

The spelling of 71818416 in words is "seventy-one million, eight hundred eighteen thousand, four hundred sixteen".