81460500 has 96 divisors (see below), whose sum is σ = 258830208. Its totient is φ = 19744000.

The previous prime is 81460499. The next prime is 81460513. The reversal of 81460500 is 506418.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14032 + ... + 18968.

It is an arithmetic number, because the mean of its divisors is an integer number (2696148).

Almost surely, 2^81460500 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 81460500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (129415104).

81460500 is an abundant number, since it is smaller than the sum of its proper divisors (177369708).

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

81460500 is a wasteful number, since it uses less digits than its factorization.

81460500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4970 (or 4958 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 81460500 is about 9025.5470748315. The cubic root of 81460500 is about 433.4932677230.

Adding to 81460500 its reverse (506418), we get a palindrome (81966918).

The spelling of 81460500 in words is "eighty-one million, four hundred sixty thousand, five hundred".