100405530 has 48 divisors (see below), whose sum is σ = 264966624. Its totient is φ = 26373600.

The previous prime is 100405517. The next prime is 100405537. The reversal of 100405530 is 35504001.

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

It is not an unprimeable number, because it can be changed into a prime (100405537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2296 + ... + 14355.

It is an arithmetic number, because the mean of its divisors is an integer number (5520138).

Almost surely, 2^100405530 is an apocalyptic number.

100405530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

100405530 is an abundant number, since it is smaller than the sum of its proper divisors (164561094).

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

100405530 is a wasteful number, since it uses less digits than its factorization.

100405530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16731 (or 16728 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 18.

The square root of 100405530 is about 10020.2559847541. The cubic root of 100405530 is about 464.7854716285.

Adding to 100405530 its reverse (35504001), we get a palindrome (135909531).

The spelling of 100405530 in words is "one hundred million, four hundred five thousand, five hundred thirty".