81008344 has 16 divisors (see below), whose sum is σ = 153236520. Its totient is φ = 40145280.

The previous prime is 81008321. The next prime is 81008351. The reversal of 81008344 is 44380018.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43902 + ... + 45709.

Almost surely, 2^81008344 is an apocalyptic number.

It is an amenable number.

81008344 is a deficient number, since it is larger than the sum of its proper divisors (72228176).

81008344 is a wasteful number, since it uses less digits than its factorization.

81008344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89730 (or 89726 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 28.

The square root of 81008344 is about 9000.4635436182. The cubic root of 81008344 is about 432.6897275332.

The spelling of 81008344 in words is "eighty-one million, eight thousand, three hundred forty-four".