628516 has 12 divisors (see below), whose sum is σ = 1257088. Its totient is φ = 269352.

The previous prime is 628499. The next prime is 628547. The reversal of 628516 is 615826.

628516 is an admirable number.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (28), and also a Moran number because the ratio is a prime number: 22447 = 628516 / (6 + 2 + 8 + 5 + 1 + 6).

It is an unprimeable number.

628516 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 3 ways as a sum of consecutive naturals, for example, 11196 + ... + 11251.

2⁶²⁸⁵¹⁶ is an apocalyptic number.

It is an amenable number.

628516 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.

628516 is a wasteful number, since it uses less digits than its factorization.

628516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22458 (or 22456 counting only the distinct ones).

The product of its digits is 2880, while the sum is 28.

The square root of 628516 is about 792.7900100279. The cubic root of 628516 is about 85.6588249689.

The spelling of 628516 in words is "six hundred twenty-eight thousand, five hundred sixteen".