100440417 has 16 divisors (see below), whose sum is σ = 166966272. Its totient is φ = 52176720.

The previous prime is 100440413. The next prime is 100440421. The reversal of 100440417 is 714044001.

It is an interprime number because it is at equal distance from previous prime (100440413) and next prime (100440421).

It is not a de Polignac number, because 100440417 - 2² = 100440413 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 100440393 and 100440402.

It is not an unprimeable number, because it can be changed into a prime (100440413) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 217173 + ... + 217634.

It is an arithmetic number, because the mean of its divisors is an integer number (10435392).

Almost surely, 2^100440417 is an apocalyptic number.

It is an amenable number.

100440417 is a deficient number, since it is larger than the sum of its proper divisors (66525855).

100440417 is a wasteful number, since it uses less digits than its factorization.

100440417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 434828.

The product of its (nonzero) digits is 448, while the sum is 21.

The square root of 100440417 is about 10021.9966573533. The cubic root of 100440417 is about 464.8392969941.

Adding to 100440417 its reverse (714044001), we get a palindrome (814484418).

The spelling of 100440417 in words is "one hundred million, four hundred forty thousand, four hundred seventeen".