102539888 has 80 divisors (see below), whose sum is σ = 229913856. Its totient is φ = 43845120.

The previous prime is 102539887. The next prime is 102539891. The reversal of 102539888 is 888935201.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102539887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 295331 + ... + 295677.

Almost surely, 2^102539888 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 102539888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (114956928).

102539888 is an abundant number, since it is smaller than the sum of its proper divisors (127373968).

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

102539888 is a wasteful number, since it uses less digits than its factorization.

102539888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 462 (or 456 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 44.

The square root of 102539888 is about 10126.1981019532. The cubic root of 102539888 is about 468.0557802362.

The spelling of 102539888 in words is "one hundred two million, five hundred thirty-nine thousand, eight hundred eighty-eight".