100320320 has 84 divisors (see below), whose sum is σ = 246590820. Its totient is φ = 38873088.

The previous prime is 100320313. The next prime is 100320343. The reversal of 100320320 is 23023001.

It can be written as a sum of positive squares in 6 ways, for example, as 36192256 + 64128064 = 6016^2 + 8008^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 437966 + ... + 438194.

It is an arithmetic number, because the mean of its divisors is an integer number (2935605).

Almost surely, 2^100320320 is an apocalyptic number.

100320320 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 100320320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (123295410).

100320320 is an abundant number, since it is smaller than the sum of its proper divisors (146270500).

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

100320320 is an equidigital number, since it uses as much as digits as its factorization.

100320320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320 (or 273 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 11.

The square root of 100320320 is about 10016.0031948877. The cubic root of 100320320 is about 464.6539530463.

Adding to 100320320 its reverse (23023001), we get a palindrome (123343321).

The spelling of 100320320 in words is "one hundred million, three hundred twenty thousand, three hundred twenty".