81298358 has 8 divisors (see below), whose sum is σ = 122382360. Its totient is φ = 40504240.

The previous prime is 81298351. The next prime is 81298363. The reversal of 81298358 is 85389218.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81298351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71768 + ... + 72891.

It is an arithmetic number, because the mean of its divisors is an integer number (15297795).

Almost surely, 2^81298358 is an apocalyptic number.

81298358 is a deficient number, since it is larger than the sum of its proper divisors (41084002).

81298358 is a wasteful number, since it uses less digits than its factorization.

81298358 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144942.

The product of its digits is 138240, while the sum is 44.

The square root of 81298358 is about 9016.5602088601. The cubic root of 81298358 is about 433.2054629942.

The spelling of 81298358 in words is "eighty-one million, two hundred ninety-eight thousand, three hundred fifty-eight".