102809568 has 24 divisors (see below), whose sum is σ = 269875368. Its totient is φ = 34269824.

The previous prime is 102809533. The next prime is 102809639. The reversal of 102809568 is 865908201.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is an unprimeable number.

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, 535371 + ... + 535562.

It is an arithmetic number, because the mean of its divisors is an integer number (11244807).

Almost surely, 2^102809568 is an apocalyptic number.

It is an amenable number.

102809568 is an abundant number, since it is smaller than the sum of its proper divisors (167065800).

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

102809568 is a wasteful number, since it uses less digits than its factorization.

102809568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1070946 (or 1070938 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 39.

The square root of 102809568 is about 10139.5053133770. The cubic root of 102809568 is about 468.4657500835.

The spelling of 102809568 in words is "one hundred two million, eight hundred nine thousand, five hundred sixty-eight".