71228912 has 40 divisors (see below), whose sum is σ = 146771856. Its totient is φ = 33371136.

The previous prime is 71228909. The next prime is 71228981. The reversal of 71228912 is 21982217.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83078 + ... + 83930.

Almost surely, 2^71228912 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71228912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73385928).

71228912 is an abundant number, since it is smaller than the sum of its proper divisors (75542944).

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

71228912 is a wasteful number, since it uses less digits than its factorization.

71228912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1185 (or 1179 counting only the distinct ones).

The product of its digits is 4032, while the sum is 32.

The square root of 71228912 is about 8439.7222703120. The cubic root of 71228912 is about 414.5263129703.

The spelling of 71228912 in words is "seventy-one million, two hundred twenty-eight thousand, nine hundred twelve".