403996222728 has 756 divisors, whose sum is σ = 1402457499495. Its totient is φ = 108729008640.

The previous prime is 403996222681. The next prime is 403996222733. The reversal of 403996222728 is 827222699304.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

403996222728 is a `hidden beast` number, since 4 + 0 + 3 + 9 + 9 + 622 + 2 + 7 + 2 + 8 = 666.

It can be written as a sum of positive squares in 5 ways, for example, as 23901778404 + 380094444324 = 154602^2 + 616518^2 .

It is a tau number, because it is divible by the number of its divisors (756).

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=449442.

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

It is an unprimeable number.

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 188 ways as a sum of consecutive naturals, for example, 9853566388 + ... + 9853566428.

Almost surely, 2^403996222728 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 403996222728

403996222728 is an abundant number, since it is smaller than the sum of its proper divisors (998461276767).

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

403996222728 is an equidigital number, since it uses as much as digits as its factorization.

403996222728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178 (or 82 counting only the distinct ones).

The product of its (nonzero) digits is 5225472, while the sum is 54.

The spelling of 403996222728 in words is "four hundred three billion, nine hundred ninety-six million, two hundred twenty-two thousand, seven hundred twenty-eight".