102399128 has 96 divisors (see below), whose sum is σ = 225309600. Its totient is φ = 43490304.

The previous prime is 102399119. The next prime is 102399139. The reversal of 102399128 is 821993201.

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 23 ways as a sum of consecutive naturals, for example, 1150508 + ... + 1150596.

It is an arithmetic number, because the mean of its divisors is an integer number (2346975).

Almost surely, 2^102399128 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 102399128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (112654800).

102399128 is an abundant number, since it is smaller than the sum of its proper divisors (122910472).

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

102399128 is a wasteful number, since it uses less digits than its factorization.

102399128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181 (or 164 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 35.

The square root of 102399128 is about 10119.2454264140. The cubic root of 102399128 is about 467.8415101189.

The spelling of 102399128 in words is "one hundred two million, three hundred ninety-nine thousand, one hundred twenty-eight".