404115431 has 4 divisors (see below), whose sum is σ = 405133752. Its totient is φ = 403097112.

The previous prime is 404115409. The next prime is 404115479. The reversal of 404115431 is 134511404.

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 404115431 - 2²² = 399921127 is a prime.

It is a super-2 number, since 2×404115431² = 326618563144631522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 404115397 and 404115406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404115931) 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, 508565 + ... + 509358.

It is an arithmetic number, because the mean of its divisors is an integer number (101283438).

Almost surely, 2^404115431 is an apocalyptic number.

404115431 is a deficient number, since it is larger than the sum of its proper divisors (1018321).

404115431 is a wasteful number, since it uses less digits than its factorization.

404115431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1018320.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 404115431 is about 20102.6224906105. The cubic root of 404115431 is about 739.3245791081.

Adding to 404115431 its reverse (134511404), we get a palindrome (538626835).

The spelling of 404115431 in words is "four hundred four million, one hundred fifteen thousand, four hundred thirty-one".