102239889444 has 216 divisors, whose sum is σ = 338924070240. Its totient is φ = 26555649120.

The previous prime is 102239889359. The next prime is 102239889449. The reversal of 102239889444 is 444988932201.

It is a happy number.

102239889444 is a `hidden beast` number, since 10 + 2 + 23 + 98 + 89 + 444 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (102239889449) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 560499 + ... + 720165.

Almost surely, 2^102239889444 is an apocalyptic number.

102239889444 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 102239889444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (169462035120).

102239889444 is an abundant number, since it is smaller than the sum of its proper divisors (236684180796).

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

102239889444 is a wasteful number, since it uses less digits than its factorization.

102239889444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159716 (or 159690 counting only the distinct ones).

The product of its (nonzero) digits is 3981312, while the sum is 54.

The spelling of 102239889444 in words is "one hundred two billion, two hundred thirty-nine million, eight hundred eighty-nine thousand, four hundred forty-four".