100323840 has 80 divisors (see below), whose sum is σ = 320747328. Its totient is φ = 26750976.

The previous prime is 100323823. The next prime is 100323863. The reversal of 100323840 is 48323001.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1149 + ... + 14211.

Almost surely, 2^100323840 is an apocalyptic number.

100323840 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 100323840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (160373664).

100323840 is an abundant number, since it is smaller than the sum of its proper divisors (220423488).

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

100323840 is an equidigital number, since it uses as much as digits as its factorization.

100323840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13089 (or 13073 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 100323840 is about 10016.1789121401. The cubic root of 100323840 is about 464.6593875145.

Adding to 100323840 its reverse (48323001), we get a palindrome (148646841).

The spelling of 100323840 in words is "one hundred million, three hundred twenty-three thousand, eight hundred forty".