404140813 has 8 divisors (see below), whose sum is σ = 438351480. Its totient is φ = 371089920.

The previous prime is 404140801. The next prime is 404140817. The reversal of 404140813 is 318041404.

It can be written as a sum of positive squares in 4 ways, for example, as 25371369 + 378769444 = 5037^2 + 19462^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 404140813 - 2¹³ = 404132621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404140817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 289218 + ... + 290611.

It is an arithmetic number, because the mean of its divisors is an integer number (54793935).

Almost surely, 2^404140813 is an apocalyptic number.

It is an amenable number.

404140813 is a deficient number, since it is larger than the sum of its proper divisors (34210667).

404140813 is a wasteful number, since it uses less digits than its factorization.

404140813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 579887.

The product of its (nonzero) digits is 1536, while the sum is 25.

The square root of 404140813 is about 20103.2537913642. The cubic root of 404140813 is about 739.3400574774.

The spelling of 404140813 in words is "four hundred four million, one hundred forty thousand, eight hundred thirteen".