100844478 has 48 divisors (see below), whose sum is σ = 254438496. Its totient is φ = 28267200.

The previous prime is 100844473. The next prime is 100844479. The reversal of 100844478 is 874448001.

It is a happy number.

100844478 is a `hidden beast` number, since 100 + 84 + 4 + 478 = 666.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100844473) by changing a digit.

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, 873 + ... + 14228.

It is an arithmetic number, because the mean of its divisors is an integer number (5300802).

Almost surely, 2^100844478 is an apocalyptic number.

100844478 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 100844478, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (127219248).

100844478 is an abundant number, since it is smaller than the sum of its proper divisors (153594018).

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

100844478 is a wasteful number, since it uses less digits than its factorization.

100844478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15169 (or 15166 counting only the distinct ones).

The product of its (nonzero) digits is 28672, while the sum is 36.

The square root of 100844478 is about 10042.1351315345. The cubic root of 100844478 is about 465.4617958303.

The spelling of 100844478 in words is "one hundred million, eight hundred forty-four thousand, four hundred seventy-eight".