4028638433 has 8 divisors (see below), whose sum is σ = 4105232040. Its totient is φ = 3952385280.

The previous prime is 4028638421. The next prime is 4028638441. The reversal of 4028638433 is 3348368204.

It can be written as a sum of positive squares in 4 ways, for example, as 85803169 + 3942835264 = 9263^2 + 62792^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 4028638433 - 2²² = 4024444129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4028638463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61160 + ... + 108617.

It is an arithmetic number, because the mean of its divisors is an integer number (513154005).

Almost surely, 2^4028638433 is an apocalyptic number.

It is an amenable number.

4028638433 is a deficient number, since it is larger than the sum of its proper divisors (76593607).

4028638433 is a wasteful number, since it uses less digits than its factorization.

4028638433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170227.

The product of its (nonzero) digits is 331776, while the sum is 41.

The square root of 4028638433 is about 63471.5560940489. The cubic root of 4028638433 is about 1591.1804365192.

The spelling of 4028638433 in words is "four billion, twenty-eight million, six hundred thirty-eight thousand, four hundred thirty-three".