404262138646 has 8 divisors (see below), whose sum is σ = 606399483384. Its totient is φ = 202128977520.

The previous prime is 404262138641. The next prime is 404262138649. The reversal of 404262138646 is 646831262404.

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

It is a junction number, because it is equal to n+sod(n) for n = 404262138596 and 404262138605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404262138641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 792000 + ... + 1198243.

It is an arithmetic number, because the mean of its divisors is an integer number (75799935423).

Almost surely, 2^404262138646 is an apocalyptic number.

404262138646 is a deficient number, since it is larger than the sum of its proper divisors (202137344738).

404262138646 is a wasteful number, since it uses less digits than its factorization.

404262138646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2091806.

The product of its (nonzero) digits is 1327104, while the sum is 46.

The spelling of 404262138646 in words is "four hundred four billion, two hundred sixty-two million, one hundred thirty-eight thousand, six hundred forty-six".