102043440 has 120 divisors (see below), whose sum is σ = 344710080. Its totient is φ = 27052032.

The previous prime is 102043421. The next prime is 102043441. The reversal of 102043440 is 44340201.

It is a tau number, because it is divible by the number of its divisors (120).

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

It is not an unprimeable number, because it can be changed into a prime (102043441) 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 23 ways as a sum of consecutive naturals, for example, 171784 + ... + 172376.

It is an arithmetic number, because the mean of its divisors is an integer number (2872584).

Almost surely, 2^102043440 is an apocalyptic number.

102043440 is a gapful number since it is divisible by the number (10) 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 102043440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (172355040).

102043440 is an abundant number, since it is smaller than the sum of its proper divisors (242666640).

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

102043440 is a wasteful number, since it uses less digits than its factorization.

102043440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 851 (or 842 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 102043440 is about 10101.6553098985. The cubic root of 102043440 is about 467.2991921668.

Adding to 102043440 its reverse (44340201), we get a palindrome (146383641).

The spelling of 102043440 in words is "one hundred two million, forty-three thousand, four hundred forty".