404271649 has 4 divisors (see below), whose sum is σ = 404902980. Its totient is φ = 403640320.

The previous prime is 404271641. The next prime is 404271671. The reversal of 404271649 is 946172404.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 180230625 + 224041024 = 13425^2 + 14968^2 .

It is a cyclic number.

It is not a de Polignac number, because 404271649 - 2³ = 404271641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (404271641) 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, 314704 + ... + 315985.

It is an arithmetic number, because the mean of its divisors is an integer number (101225745).

Almost surely, 2^404271649 is an apocalyptic number.

It is an amenable number.

404271649 is a deficient number, since it is larger than the sum of its proper divisors (631331).

404271649 is an equidigital number, since it uses as much as digits as its factorization.

404271649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 631330.

The product of its (nonzero) digits is 48384, while the sum is 37.

The square root of 404271649 is about 20106.5076281288. The cubic root of 404271649 is about 739.4198331858.

The spelling of 404271649 in words is "four hundred four million, two hundred seventy-one thousand, six hundred forty-nine".