71616228 has 12 divisors (see below), whose sum is σ = 167104560. Its totient is φ = 23872072.

The previous prime is 71616221. The next prime is 71616229. The reversal of 71616228 is 82261617.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×71616228² = 10257768225895968, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (71616221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2983998 + ... + 2984021.

It is an arithmetic number, because the mean of its divisors is an integer number (13925380).

Almost surely, 2^71616228 is an apocalyptic number.

It is an amenable number.

71616228 is an abundant number, since it is smaller than the sum of its proper divisors (95488332).

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

71616228 is a wasteful number, since it uses less digits than its factorization.

71616228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5968026 (or 5968024 counting only the distinct ones).

The product of its digits is 8064, while the sum is 33.

The square root of 71616228 is about 8462.6371776179. The cubic root of 71616228 is about 415.2763012197.

The spelling of 71616228 in words is "seventy-one million, six hundred sixteen thousand, two hundred twenty-eight".