203401404 has 18 divisors (see below), whose sum is σ = 514153640. Its totient is φ = 67800456.

The previous prime is 203401381. The next prime is 203401409. The reversal of 203401404 is 404104302.

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×203401404² = 82744262298342432, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203401409) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2824984 + ... + 2825055.

Almost surely, 2^203401404 is an apocalyptic number.

It is an amenable number.

203401404 is an abundant number, since it is smaller than the sum of its proper divisors (310752236).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

203401404 is a wasteful number, since it uses less digits than its factorization.

203401404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5650049 (or 5650044 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 203401404 is about 14261.8864109907. The cubic root of 203401404 is about 588.1001842345.

Adding to 203401404 its reverse (404104302), we get a palindrome (607505706).

The spelling of 203401404 in words is "two hundred three million, four hundred one thousand, four hundred four".