102805180 has 12 divisors (see below), whose sum is σ = 215890920. Its totient is φ = 41122064.

The previous prime is 102805169. The next prime is 102805189. The reversal of 102805180 is 81508201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102805189) 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 3 ways as a sum of consecutive naturals, for example, 2570110 + ... + 2570149.

It is an arithmetic number, because the mean of its divisors is an integer number (17990910).

Almost surely, 2^102805180 is an apocalyptic number.

102805180 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102805180 is an abundant number, since it is smaller than the sum of its proper divisors (113085740).

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

102805180 is a wasteful number, since it uses less digits than its factorization.

102805180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5140268 (or 5140266 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 25.

The square root of 102805180 is about 10139.2889297031. The cubic root of 102805180 is about 468.4590851495.

The spelling of 102805180 in words is "one hundred two million, eight hundred five thousand, one hundred eighty".