100403444 has 6 divisors (see below), whose sum is σ = 175706034. Its totient is φ = 50201720.

The previous prime is 100403431. The next prime is 100403489. The reversal of 100403444 is 444304001.

It can be written as a sum of positive squares in only one way, i.e., 88924900 + 11478544 = 9430^2 + 3388^2 .

It is a super-2 number, since 2×100403444² = 20161703134122272, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12550427 + ... + 12550434.

It is an arithmetic number, because the mean of its divisors is an integer number (29284339).

Almost surely, 2^100403444 is an apocalyptic number.

It is an amenable number.

100403444 is a deficient number, since it is larger than the sum of its proper divisors (75302590).

100403444 is a wasteful number, since it uses less digits than its factorization.

100403444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25100865 (or 25100863 counting only the distinct ones).

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

The square root of 100403444 is about 10020.1518950563. The cubic root of 100403444 is about 464.7822528509.

Adding to 100403444 its reverse (444304001), we get a palindrome (544707445).

The spelling of 100403444 in words is "one hundred million, four hundred three thousand, four hundred forty-four".