100023220 has 48 divisors (see below), whose sum is σ = 241214400. Its totient is φ = 34456320.

The previous prime is 100023139. The next prime is 100023221. The reversal of 100023220 is 22320001.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 100023197 and 100023206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100023221) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 7785 + ... + 16144.

It is an arithmetic number, because the mean of its divisors is an integer number (5025300).

Almost surely, 2^100023220 is an apocalyptic number.

100023220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100023220 is an abundant number, since it is smaller than the sum of its proper divisors (141191180).

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

100023220 is a wasteful number, since it uses less digits than its factorization.

100023220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23968 (or 23966 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 10.

The square root of 100023220 is about 10001.1609326118. The cubic root of 100023220 is about 464.1948064785.

Adding to 100023220 its reverse (22320001), we get a palindrome (122343221).

The spelling of 100023220 in words is "one hundred million, twenty-three thousand, two hundred twenty".