81230358 has 64 divisors (see below), whose sum is σ = 188052480. Its totient is φ = 23133600.

The previous prime is 81230351. The next prime is 81230417. The reversal of 81230358 is 85303218.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81230351) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 264441 + ... + 264747.

It is an arithmetic number, because the mean of its divisors is an integer number (2938320).

Almost surely, 2^81230358 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 81230358, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94026240).

81230358 is an abundant number, since it is smaller than the sum of its proper divisors (106822122).

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

81230358 is a wasteful number, since it uses less digits than its factorization.

81230358 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 553.

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 81230358 is about 9012.7885806780. The cubic root of 81230358 is about 433.0846479735.

The spelling of 81230358 in words is "eighty-one million, two hundred thirty thousand, three hundred fifty-eight".