102102408 has 48 divisors (see below), whose sum is σ = 292797180. Its totient is φ = 32031744.

The previous prime is 102102383. The next prime is 102102419. The reversal of 102102408 is 804201201.

It can be written as a sum of positive squares in 2 ways, for example, as 100761444 + 1340964 = 10038^2 + 1158^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

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 11 ways as a sum of consecutive naturals, for example, 40485 + ... + 42932.

Almost surely, 2^102102408 is an apocalyptic number.

102102408 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

102102408 is an abundant number, since it is smaller than the sum of its proper divisors (190694772).

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

102102408 is a wasteful number, since it uses less digits than its factorization.

102102408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83446 (or 83439 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

The square root of 102102408 is about 10104.5736179217. The cubic root of 102102408 is about 467.3891878019.

Adding to 102102408 its reverse (804201201), we get a palindrome (906303609).

The spelling of 102102408 in words is "one hundred two million, one hundred two thousand, four hundred eight".