71872218 has 32 divisors (see below), whose sum is σ = 174237120. Its totient is φ = 21779280.

The previous prime is 71872211. The next prime is 71872249. The reversal of 71872218 is 81227817.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (71872211) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 59905 + ... + 61092.

It is an arithmetic number, because the mean of its divisors is an integer number (5444910).

Almost surely, 2^71872218 is an apocalyptic number.

71872218 is an abundant number, since it is smaller than the sum of its proper divisors (102364902).

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

71872218 is a wasteful number, since it uses less digits than its factorization.

71872218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121019 (or 121013 counting only the distinct ones).

The product of its digits is 12544, while the sum is 36.

The square root of 71872218 is about 8477.7484039101. The cubic root of 71872218 is about 415.7705102886.

The spelling of 71872218 in words is "seventy-one million, eight hundred seventy-two thousand, two hundred eighteen".