102805312 has 28 divisors (see below), whose sum is σ = 205889860. Its totient is φ = 50927616.

The previous prime is 102805301. The next prime is 102805321. The reversal of 102805312 is 213508201.

It can be written as a sum of positive squares in 2 ways, for example, as 79995136 + 22810176 = 8944^2 + 4776^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 393 + ... + 14344.

Almost surely, 2^102805312 is an apocalyptic number.

It is an amenable number.

102805312 is an abundant number, since it is smaller than the sum of its proper divisors (103084548).

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

102805312 is a wasteful number, since it uses less digits than its factorization.

102805312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14858 (or 14848 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 102805312 is about 10139.2954390332. The cubic root of 102805312 is about 468.4592856471.

The spelling of 102805312 in words is "one hundred two million, eight hundred five thousand, three hundred twelve".