81208360 has 16 divisors (see below), whose sum is σ = 182718900. Its totient is φ = 32483328.

The previous prime is 81208357. The next prime is 81208363. The reversal of 81208360 is 6380218.

It is an interprime number because it is at equal distance from previous prime (81208357) and next prime (81208363).

It can be written as a sum of positive squares in 2 ways, for example, as 80532676 + 675684 = 8974^2 + 822^2 .

It is not an unprimeable number, because it can be changed into a prime (81208363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1015065 + ... + 1015144.

Almost surely, 2^81208360 is an apocalyptic number.

It is an amenable number.

81208360 is an abundant number, since it is smaller than the sum of its proper divisors (101510540).

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

81208360 is a wasteful number, since it uses less digits than its factorization.

81208360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2030220 (or 2030216 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 81208360 is about 9011.5681210320. The cubic root of 81208360 is about 433.0455498807.

Adding to 81208360 its reverse (6380218), we get a palindrome (87588578).

The spelling of 81208360 in words is "eighty-one million, two hundred eight thousand, three hundred sixty".