100434440 has 32 divisors (see below), whose sum is σ = 226860480. Its totient is φ = 40016832.

The previous prime is 100434431. The next prime is 100434443. The reversal of 100434440 is 44434001.

It is a super-2 number, since 2×100434440² = 20174153476227200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (100434443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5747 + ... + 15293.

It is an arithmetic number, because the mean of its divisors is an integer number (7089390).

Almost surely, 2^100434440 is an apocalyptic number.

100434440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100434440 is an abundant number, since it is smaller than the sum of its proper divisors (126426040).

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

100434440 is a wasteful number, since it uses less digits than its factorization.

100434440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9821 (or 9817 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 100434440 is about 10021.6984588442. The cubic root of 100434440 is about 464.8300762717.

Adding to 100434440 its reverse (44434001), we get a palindrome (144868441).

The spelling of 100434440 in words is "one hundred million, four hundred thirty-four thousand, four hundred forty".