403128256 has 28 divisors (see below), whose sum is σ = 801095680. Its totient is φ = 201277440.

The previous prime is 403128251. The next prime is 403128281. The reversal of 403128256 is 652821304.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (403128251) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 45121 + ... + 53311.

It is an arithmetic number, because the mean of its divisors is an integer number (28610560).

Almost surely, 2^403128256 is an apocalyptic number.

It is an amenable number.

403128256 is a deficient number, since it is larger than the sum of its proper divisors (397967424).

403128256 is an equidigital number, since it uses as much as digits as its factorization.

403128256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8972 (or 8962 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 403128256 is about 20078.0540889798. The cubic root of 403128256 is about 738.7220797718.

The spelling of 403128256 in words is "four hundred three million, one hundred twenty-eight thousand, two hundred fifty-six".