404073736728 has 64 divisors (see below), whose sum is σ = 1055809209600. Its totient is φ = 128626861440.

The previous prime is 404073736723. The next prime is 404073736747. The reversal of 404073736728 is 827637370404.

It is a happy number.

It is a super-2 number, since 2×404073736728² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404073736723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 249603 + ... + 932978.

It is an arithmetic number, because the mean of its divisors is an integer number (16497018900).

Almost surely, 2^404073736728 is an apocalyptic number.

It is an amenable number.

404073736728 is an abundant number, since it is smaller than the sum of its proper divisors (651735472872).

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

404073736728 is a wasteful number, since it uses less digits than its factorization.

404073736728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1183232 (or 1183228 counting only the distinct ones).

The product of its (nonzero) digits is 4741632, while the sum is 51.

The spelling of 404073736728 in words is "four hundred four billion, seventy-three million, seven hundred thirty-six thousand, seven hundred twenty-eight".