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628308 = 223231563
BaseRepresentation
bin10011001011001010100
31011220212200
42121121110
5130101213
621244500
75224542
oct2313124
91156780
10628308
1139a06a
12263730
1318cca5
14124d92
15c6273
hex99654

628308 has 36 divisors (see below), whose sum is σ = 1642368. Its totient is φ = 202320.

The previous prime is 628301. The next prime is 628319. The reversal of 628308 is 803826.

628308 is a `hidden beast` number, since 628 + 30 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is an Ulam number.

It is a nialpdrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (628301) by changing a digit.

628308 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 835 + ... + 1397.

2628308 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 628308, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (821184).

628308 is an abundant number, since it is smaller than the sum of its proper divisors (1014060).

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

628308 is a wasteful number, since it uses less digits than its factorization.

628308 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 604 (or 599 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 628308 is about 792.6588168941. The cubic root of 628308 is about 85.6493746651.

The spelling of 628308 in words is "six hundred twenty-eight thousand, three hundred eight".

Divisors: 1 2 3 4 6 9 12 18 31 36 62 93 124 186 279 372 558 563 1116 1126 1689 2252 3378 5067 6756 10134 17453 20268 34906 52359 69812 104718 157077 209436 314154 628308