404263943928 has 80 divisors (see below), whose sum is σ = 1219414414680. Its totient is φ = 124388903232.

The previous prime is 404263943921. The next prime is 404263943929. The reversal of 404263943928 is 829349362404.

404263943928 is a `hidden beast` number, since 40 + 426 + 3 + 94 + 3 + 92 + 8 = 666.

It is a super-2 number, since 2×404263943928² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404263943921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 23986350 + ... + 24003197.

Almost surely, 2^404263943928 is an apocalyptic number.

It is an amenable number.

404263943928 is an abundant number, since it is smaller than the sum of its proper divisors (815150470752).

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

404263943928 is a wasteful number, since it uses less digits than its factorization.

404263943928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47989578 (or 47989565 counting only the distinct ones).

The product of its (nonzero) digits is 8957952, while the sum is 54.

The spelling of 404263943928 in words is "four hundred four billion, two hundred sixty-three million, nine hundred forty-three thousand, nine hundred twenty-eight".