404401031 has 4 divisors (see below), whose sum is σ = 404514864. Its totient is φ = 404287200.

The previous prime is 404400991. The next prime is 404401033. The reversal of 404401031 is 130104404.

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

It is a cyclic number.

It is not a de Polignac number, because 404401031 - 2²⁶ = 337292167 is a prime.

It is a super-3 number, since 3×404401031³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404401033) 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, 51410 + ... + 58751.

It is an arithmetic number, because the mean of its divisors is an integer number (101128716).

Almost surely, 2^404401031 is an apocalyptic number.

404401031 is a deficient number, since it is larger than the sum of its proper divisors (113833).

404401031 is a wasteful number, since it uses less digits than its factorization.

404401031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113832.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 404401031 is about 20109.7247867792. The cubic root of 404401031 is about 739.4987054104.

Adding to 404401031 its reverse (130104404), we get a palindrome (534505435).

The spelling of 404401031 in words is "four hundred four million, four hundred one thousand, thirty-one".