100404490 has 16 divisors (see below), whose sum is σ = 185136840. Its totient is φ = 39182080.

The previous prime is 100404487. The next prime is 100404509. The reversal of 100404490 is 94404001.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 25010001 + 75394489 = 5001^2 + 8683^2 .

It is a super-2 number, since 2×100404490² = 20162123224320200, which contains 22 as substring.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 122035 + ... + 122854.

Almost surely, 2^100404490 is an apocalyptic number.

100404490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

100404490 is a deficient number, since it is larger than the sum of its proper divisors (84732350).

100404490 is a wasteful number, since it uses less digits than its factorization.

100404490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244937.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 100404490 is about 10020.2040897379. The cubic root of 100404490 is about 464.7838668744.

Adding to 100404490 its reverse (94404001), we get a palindrome (194808491).

The spelling of 100404490 in words is "one hundred million, four hundred four thousand, four hundred ninety".