81073398 has 32 divisors (see below), whose sum is σ = 185875200. Its totient is φ = 23093280.

The previous prime is 81073397. The next prime is 81073403. The reversal of 81073398 is 89337018.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81073397) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11893 + ... + 17423.

It is an arithmetic number, because the mean of its divisors is an integer number (5808600).

Almost surely, 2^81073398 is an apocalyptic number.

81073398 is an abundant number, since it is smaller than the sum of its proper divisors (104801802).

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

81073398 is a wasteful number, since it uses less digits than its factorization.

81073398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5892.

The product of its (nonzero) digits is 36288, while the sum is 39.

The square root of 81073398 is about 9004.0767433424. The cubic root of 81073398 is about 432.8055208152.

The spelling of 81073398 in words is "eighty-one million, seventy-three thousand, three hundred ninety-eight".