81073008 has 40 divisors (see below), whose sum is σ = 232710800. Its totient is φ = 27024192.

The previous prime is 81073007. The next prime is 81073043. The reversal of 81073008 is 80037018.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81073007) 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, 93403 + ... + 94266.

It is an arithmetic number, because the mean of its divisors is an integer number (5817770).

Almost surely, 2^81073008 is an apocalyptic number.

It is an amenable number.

81073008 is an abundant number, since it is smaller than the sum of its proper divisors (151637792).

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

81073008 is a wasteful number, since it uses less digits than its factorization.

81073008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187686 (or 187674 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 27.

The square root of 81073008 is about 9004.0550864597. The cubic root of 81073008 is about 432.8048268168.

The spelling of 81073008 in words is "eighty-one million, seventy-three thousand, eight".