81067228 has 24 divisors (see below), whose sum is σ = 155151360. Its totient is φ = 36756720.

The previous prime is 81067223. The next prime is 81067241. The reversal of 81067228 is 82276018.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 81067193 and 81067202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81067223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17413 + ... + 21571.

It is an arithmetic number, because the mean of its divisors is an integer number (6464640).

Almost surely, 2^81067228 is an apocalyptic number.

It is an amenable number.

81067228 is a deficient number, since it is larger than the sum of its proper divisors (74084132).

81067228 is a wasteful number, since it uses less digits than its factorization.

81067228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4617 (or 4615 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 34.

The square root of 81067228 is about 9003.7341142439. The cubic root of 81067228 is about 432.7945411438.

The spelling of 81067228 in words is "eighty-one million, sixty-seven thousand, two hundred twenty-eight".