81344598 has 32 divisors (see below), whose sum is σ = 168203520. Its totient is φ = 26211360.

The previous prime is 81344597. The next prime is 81344603. The reversal of 81344598 is 89544318.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81344597) 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 15 ways as a sum of consecutive naturals, for example, 19711 + ... + 23477.

It is an arithmetic number, because the mean of its divisors is an integer number (5256360).

Almost surely, 2^81344598 is an apocalyptic number.

81344598 is an abundant number, since it is smaller than the sum of its proper divisors (86858922).

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

81344598 is a wasteful number, since it uses less digits than its factorization.

81344598 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3892.

The product of its digits is 138240, while the sum is 42.

The square root of 81344598 is about 9019.1240151137. The cubic root of 81344598 is about 433.2875787325.

The spelling of 81344598 in words is "eighty-one million, three hundred forty-four thousand, five hundred ninety-eight".