628650 has 72 divisors (see below), whose sum is σ = 1857024. Its totient is φ = 151200.

The previous prime is 628591. The next prime is 628651. The reversal of 628650 is 56826.

628650 = T₂₉ + T₃₀ + ... + T₁₅₅.

628650 is a `hidden beast` number, since 6 + 2 + 8 + 650 = 666.

It is an Ulam number.

It is a nialpdrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (628651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 4887 + ... + 5013.

It is an arithmetic number, because the mean of its divisors is an integer number (25792).

2⁶²⁸⁶⁵⁰ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 628650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (928512).

628650 is an abundant number, since it is smaller than the sum of its proper divisors (1228374).

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

628650 is a wasteful number, since it uses less digits than its factorization.

628650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156 (or 148 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 628650 is about 792.8745171842. The cubic root of 628650 is about 85.6649120411.

It can be divided in two parts, 6286 and 50, that added together give a palindrome (6336).

The spelling of 628650 in words is "six hundred twenty-eight thousand, six hundred fifty".