100544420 has 12 divisors (see below), whose sum is σ = 211143324. Its totient is φ = 40217760.

The previous prime is 100544419. The next prime is 100544461. The reversal of 100544420 is 24445001.

It can be written as a sum of positive squares in 2 ways, for example, as 12222016 + 88322404 = 3496^2 + 9398^2 .

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 5027221 = 100544420 / (1 + 0 + 0 + 5 + 4 + 4 + 4 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 100544392 and 100544401.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2513591 + ... + 2513630.

It is an arithmetic number, because the mean of its divisors is an integer number (17595277).

Almost surely, 2^100544420 is an apocalyptic number.

100544420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100544420 is an abundant number, since it is smaller than the sum of its proper divisors (110598904).

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

100544420 is a wasteful number, since it uses less digits than its factorization.

100544420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5027230 (or 5027228 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 100544420 is about 10027.1840513676. The cubic root of 100544420 is about 464.9996839710. Note that the first 3 decimals are identical.

Adding to 100544420 its reverse (24445001), we get a palindrome (124989421).

The spelling of 100544420 in words is "one hundred million, five hundred forty-four thousand, four hundred twenty".