628638038 has 32 divisors (see below), whose sum is σ = 1098662400. Its totient is φ = 264190464.

The previous prime is 628638037. The next prime is 628638077. The reversal of 628638038 is 830836826.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 628638038.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (628638037) 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 15 ways as a sum of consecutive naturals, for example, 475943 + ... + 477261.

It is an arithmetic number, because the mean of its divisors is an integer number (34333200).

Almost surely, 2^628638038 is an apocalyptic number.

628638038 is a deficient number, since it is larger than the sum of its proper divisors (470024362).

628638038 is a wasteful number, since it uses less digits than its factorization.

628638038 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1964.

The product of its (nonzero) digits is 331776, while the sum is 44.

The square root of 628638038 is about 25072.6551844834. The cubic root of 628638038 is about 856.6436869152.

The spelling of 628638038 in words is "six hundred twenty-eight million, six hundred thirty-eight thousand, thirty-eight".