1004400232405 has 4 divisors (see below), whose sum is σ = 1205280278892. Its totient is φ = 803520185920.

The previous prime is 1004400232403. The next prime is 1004400232453. The reversal of 1004400232405 is 5042320044001.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 696587205924 + 307813026481 = 834618^2 + 554809^2 .

It is not a de Polignac number, because 1004400232405 - 2¹ = 1004400232403 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1004400232405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1004400232403) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100440023236 + ... + 100440023245.

It is an arithmetic number, because the mean of its divisors is an integer number (301320069723).

Almost surely, 2^{1004400232405} is an apocalyptic number.

It is an amenable number.

1004400232405 is a deficient number, since it is larger than the sum of its proper divisors (200880046487).

1004400232405 is an equidigital number, since it uses as much as digits as its factorization.

1004400232405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200880046486.

The product of its (nonzero) digits is 3840, while the sum is 25.

Adding to 1004400232405 its reverse (5042320044001), we get a palindrome (6046720276406).

The spelling of 1004400232405 in words is "one trillion, four billion, four hundred million, two hundred thirty-two thousand, four hundred five".