102055044 has 144 divisors (see below), whose sum is σ = 303878400. Its totient is φ = 26574912.

The previous prime is 102055033. The next prime is 102055049. The reversal of 102055044 is 440550201.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 102055044.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102055049) 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 47 ways as a sum of consecutive naturals, for example, 1291797 + ... + 1291875.

Almost surely, 2^102055044 is an apocalyptic number.

102055044 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 102055044, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (151939200).

102055044 is an abundant number, since it is smaller than the sum of its proper divisors (201823356).

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

102055044 is a wasteful number, since it uses less digits than its factorization.

102055044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139 (or 104 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 102055044 is about 10102.2296548831. The cubic root of 102055044 is about 467.3169046700.

The spelling of 102055044 in words is "one hundred two million, fifty-five thousand, forty-four".