100004220 has 168 divisors, whose sum is σ = 332359440. Its totient is φ = 25264224.

The previous prime is 100004189. The next prime is 100004243. The reversal of 100004220 is 22400001.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 5263371 + ... + 5263389.

It is an arithmetic number, because the mean of its divisors is an integer number (1978330).

Almost surely, 2^100004220 is an apocalyptic number.

100004220 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 100004220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (166179720).

100004220 is an abundant number, since it is smaller than the sum of its proper divisors (232355220).

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

100004220 is an frugal number, since it uses more digits than its factorization.

100004220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84 (or 29 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 9.

The square root of 100004220 is about 10000.2109977740. The cubic root of 100004220 is about 464.1654124377.

Adding to 100004220 its reverse (22400001), we get a palindrome (122404221).

The spelling of 100004220 in words is "one hundred million, four thousand, two hundred twenty".