663028628 has 24 divisors (see below), whose sum is σ = 1232241192. Its totient is φ = 311076864.

The previous prime is 663028621. The next prime is 663028631. The reversal of 663028628 is 826820366.

It can be written as a sum of positive squares in 4 ways, for example, as 117245584 + 545783044 = 10828^2 + 23362^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663028621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8450 + ... + 37382.

It is an arithmetic number, because the mean of its divisors is an integer number (51343383).

Almost surely, 2^663028628 is an apocalyptic number.

663028628 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

663028628 is a deficient number, since it is larger than the sum of its proper divisors (569212564).

663028628 is a wasteful number, since it uses less digits than its factorization.

663028628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29291 (or 29289 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 41.

The square root of 663028628 is about 25749.3422828623. The cubic root of 663028628 is about 871.9885056561.

The spelling of 663028628 in words is "six hundred sixty-three million, twenty-eight thousand, six hundred twenty-eight".