100005408 has 96 divisors (see below), whose sum is σ = 293428800. Its totient is φ = 33136128.

The previous prime is 100005397. The next prime is 100005421. The reversal of 100005408 is 804500001.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 244308 + ... + 244716.

It is an arithmetic number, because the mean of its divisors is an integer number (3056550).

Almost surely, 2^100005408 is an apocalyptic number.

100005408 is a gapful number since it is divisible by the number (18) 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 100005408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (146714400).

100005408 is an abundant number, since it is smaller than the sum of its proper divisors (193423392).

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

100005408 is a wasteful number, since it uses less digits than its factorization.

100005408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 711 (or 697 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 100005408 is about 10000.2703963443. The cubic root of 100005408 is about 464.1672504479.

Adding to 100005408 its reverse (804500001), we get a palindrome (904505409).

The spelling of 100005408 in words is "one hundred million, five thousand, four hundred eight".