81803060 has 12 divisors (see below), whose sum is σ = 171786468. Its totient is φ = 32721216.

The previous prime is 81803053. The next prime is 81803063. The reversal of 81803060 is 6030818.

It can be written as a sum of positive squares in 2 ways, for example, as 21771556 + 60031504 = 4666^2 + 7748^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81803063) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2045057 + ... + 2045096.

It is an arithmetic number, because the mean of its divisors is an integer number (14315539).

Almost surely, 2^81803060 is an apocalyptic number.

It is an amenable number.

81803060 is an abundant number, since it is smaller than the sum of its proper divisors (89983408).

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

81803060 is a wasteful number, since it uses less digits than its factorization.

81803060 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4090162 (or 4090160 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 81803060 is about 9044.5044087556. The cubic root of 81803060 is about 434.1000639964.

Adding to 81803060 its reverse (6030818), we get a palindrome (87833878).

The spelling of 81803060 in words is "eighty-one million, eight hundred three thousand, sixty".