71394228 has 36 divisors (see below), whose sum is σ = 180730368. Its totient is φ = 23763600.

The previous prime is 71394227. The next prime is 71394283. The reversal of 71394228 is 82249317.

It is a tau number, because it is divible by the number of its divisors (36).

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

It is a junction number, because it is equal to n+sod(n) for n = 71394192 and 71394201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71394221) 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 11 ways as a sum of consecutive naturals, for example, 40575 + ... + 42297.

It is an arithmetic number, because the mean of its divisors is an integer number (5020288).

Almost surely, 2^71394228 is an apocalyptic number.

It is an amenable number.

71394228 is an abundant number, since it is smaller than the sum of its proper divisors (109336140).

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

71394228 is a wasteful number, since it uses less digits than its factorization.

71394228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2884 (or 2879 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 71394228 is about 8449.5105183673. The cubic root of 71394228 is about 414.8467581501.

The spelling of 71394228 in words is "seventy-one million, three hundred ninety-four thousand, two hundred twenty-eight".