628385844 has 24 divisors (see below), whose sum is σ = 1501996608. Its totient is φ = 204352960.

The previous prime is 628385843. The next prime is 628385851. The reversal of 628385844 is 448583826.

It is a junction number, because it is equal to n+sod(n) for n = 628385793 and 628385802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (628385843) 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 7 ways as a sum of consecutive naturals, for example, 638112 + ... + 639095.

It is an arithmetic number, because the mean of its divisors is an integer number (62583192).

Almost surely, 2^628385844 is an apocalyptic number.

It is an amenable number.

628385844 is an abundant number, since it is smaller than the sum of its proper divisors (873610764).

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

628385844 is a wasteful number, since it uses less digits than its factorization.

628385844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1277255 (or 1277253 counting only the distinct ones).

The product of its digits is 1474560, while the sum is 48.

The square root of 628385844 is about 25067.6254160620. The cubic root of 628385844 is about 856.5291168546.

The spelling of 628385844 in words is "six hundred twenty-eight million, three hundred eighty-five thousand, eight hundred forty-four".