404139768 has 16 divisors (see below), whose sum is σ = 1010349480. Its totient is φ = 134713248.

The previous prime is 404139751. The next prime is 404139773. The reversal of 404139768 is 867931404.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8419555 + ... + 8419602.

Almost surely, 2^404139768 is an apocalyptic number.

It is an amenable number.

404139768 is an abundant number, since it is smaller than the sum of its proper divisors (606209712).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

404139768 is a wasteful number, since it uses less digits than its factorization.

404139768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16839166 (or 16839162 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 42.

The square root of 404139768 is about 20103.2278005299. The cubic root of 404139768 is about 739.3394202317.

The spelling of 404139768 in words is "four hundred four million, one hundred thirty-nine thousand, seven hundred sixty-eight".