81460304 has 30 divisors (see below), whose sum is σ = 163662330. Its totient is φ = 39231808.

The previous prime is 81460289. The next prime is 81460321. The reversal of 81460304 is 40306418.

It can be written as a sum of positive squares in only one way, i.e., 70224400 + 11235904 = 8380^2 + 3352^2 .

It is a super-2 number, since 2×81460304² = 13271562255544832, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 194207 + ... + 194625.

It is an arithmetic number, because the mean of its divisors is an integer number (5455411).

Almost surely, 2^81460304 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 81460304, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81831165).

81460304 is an abundant number, since it is smaller than the sum of its proper divisors (82202026).

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

81460304 is an equidigital number, since it uses as much as digits as its factorization.

81460304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 875 (or 450 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 81460304 is about 9025.5362167574. The cubic root of 81460304 is about 433.4929200504.

The spelling of 81460304 in words is "eighty-one million, four hundred sixty thousand, three hundred four".