102187808 has 18 divisors (see below), whose sum is σ = 201294891. Its totient is φ = 51065312.

The previous prime is 102187807. The next prime is 102187829. The reversal of 102187808 is 808781201.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in only one way, i.e., 51093904 + 51093904 = 7148^2 + 7148^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=7148.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102187807) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 56291 + ... + 58077.

Almost surely, 2^102187808 is an apocalyptic number.

It is an amenable number.

102187808 is a deficient number, since it is larger than the sum of its proper divisors (99107083).

102187808 is an frugal number, since it uses more digits than its factorization.

102187808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3584 (or 1789 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 35.

The square root of 102187808 is about 10108.7985438429. The cubic root of 102187808 is about 467.5194619520.

The spelling of 102187808 in words is "one hundred two million, one hundred eighty-seven thousand, eight hundred eight".