404531641 has 4 divisors (see below), whose sum is σ = 425822800. Its totient is φ = 383240484.

The previous prime is 404531627. The next prime is 404531653. The reversal of 404531641 is 146135404.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 404531641 - 2⁷ = 404531513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (404531341) 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, 10645551 + ... + 10645588.

It is an arithmetic number, because the mean of its divisors is an integer number (106455700).

Almost surely, 2^404531641 is an apocalyptic number.

It is an amenable number.

404531641 is a deficient number, since it is larger than the sum of its proper divisors (21291159).

404531641 is a wasteful number, since it uses less digits than its factorization.

404531641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21291158.

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 404531641 is about 20112.9719584153. The cubic root of 404531641 is about 739.5783091719.

The spelling of 404531641 in words is "four hundred four million, five hundred thirty-one thousand, six hundred forty-one".