71487918 has 24 divisors (see below), whose sum is σ = 163043400. Its totient is φ = 22575024.

The previous prime is 71487917. The next prime is 71487931. The reversal of 71487918 is 81978417.

It is a super-2 number, since 2×71487918² = 10221044839949448, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71487917) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 104173 + ... + 104856.

It is an arithmetic number, because the mean of its divisors is an integer number (6793475).

Almost surely, 2^71487918 is an apocalyptic number.

71487918 is an abundant number, since it is smaller than the sum of its proper divisors (91555482).

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

71487918 is a wasteful number, since it uses less digits than its factorization.

71487918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209056 (or 209053 counting only the distinct ones).

The product of its digits is 112896, while the sum is 45.

The square root of 71487918 is about 8455.0528088238. The cubic root of 71487918 is about 415.0281453791.

The spelling of 71487918 in words is "seventy-one million, four hundred eighty-seven thousand, nine hundred eighteen".