630028 has 12 divisors (see below), whose sum is σ = 1260112. Its totient is φ = 270000.

The previous prime is 630023. The next prime is 630029. The reversal of 630028 is 820036.

630028 = 297² + 298² + ... + 303².

630028 is an admirable number.

It is a hoax number, since the sum of its digits (19) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 629987 and 630014.

It is not an unprimeable number, because it can be changed into a prime (630023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11223 + ... + 11278.

2⁶³⁰⁰²⁸ is an apocalyptic number.

It is an amenable number.

630028 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

630028 is a wasteful number, since it uses less digits than its factorization.

630028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22512 (or 22510 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 630028 is about 793.7430314655. The cubic root of 630028 is about 85.7274588219.

It can be divided in two parts, 6300 and 28, that multiplied together give a square (176400 = 420²).

The spelling of 630028 in words is "six hundred thirty thousand, twenty-eight".