404378349 has 16 divisors (see below), whose sum is σ = 587121600. Its totient is φ = 246589056.

The previous prime is 404378347. The next prime is 404378357. The reversal of 404378349 is 943873404.

It is not a de Polignac number, because 404378349 - 2¹ = 404378347 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 404378349.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404378347) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 120664 + ... + 123969.

It is an arithmetic number, because the mean of its divisors is an integer number (36695100).

Almost surely, 2^404378349 is an apocalyptic number.

It is an amenable number.

404378349 is a deficient number, since it is larger than the sum of its proper divisors (182743251).

404378349 is a wasteful number, since it uses less digits than its factorization.

404378349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244684.

The product of its (nonzero) digits is 290304, while the sum is 42.

The square root of 404378349 is about 20109.1608228688. The cubic root of 404378349 is about 739.4848795116.

The spelling of 404378349 in words is "four hundred four million, three hundred seventy-eight thousand, three hundred forty-nine".