81022444 has 24 divisors (see below), whose sum is σ = 143628800. Its totient is φ = 39989376.

The previous prime is 81022427. The next prime is 81022453. The reversal of 81022444 is 44422018.

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, 177064 + ... + 177520.

Almost surely, 2^81022444 is an apocalyptic number.

It is an amenable number.

81022444 is a deficient number, since it is larger than the sum of its proper divisors (62606356).

81022444 is a wasteful number, since it uses less digits than its factorization.

81022444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 937 (or 935 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 25.

The square root of 81022444 is about 9001.2468025269. The cubic root of 81022444 is about 432.7148301787.

The spelling of 81022444 in words is "eighty-one million, twenty-two thousand, four hundred forty-four".