205401404 has 24 divisors (see below), whose sum is σ = 388830288. Its totient is φ = 94377600.

The previous prime is 205401401. The next prime is 205401407. The reversal of 205401404 is 404104502.

It is an interprime number because it is at equal distance from previous prime (205401401) and next prime (205401407).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205401401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3104 + ... + 20504.

It is an arithmetic number, because the mean of its divisors is an integer number (16201262).

Almost surely, 2^205401404 is an apocalyptic number.

It is an amenable number.

205401404 is a deficient number, since it is larger than the sum of its proper divisors (183428884).

205401404 is a wasteful number, since it uses less digits than its factorization.

205401404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17645 (or 17643 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 205401404 is about 14331.8318438363. The cubic root of 205401404 is about 590.0214528252.

Adding to 205401404 its reverse (404104502), we get a palindrome (609505906).

The spelling of 205401404 in words is "two hundred five million, four hundred one thousand, four hundred four".