628215 has 32 divisors (see below), whose sum is σ = 1191936. Its totient is φ = 276480.

The previous prime is 628213. The next prime is 628217. The reversal of 628215 is 512826.

628215 = T₃₀ + T₃₁ + ... + T₁₅₅.

It is an interprime number because it is at equal distance from previous prime (628213) and next prime (628217).

It is not a de Polignac number, because 628215 - 2¹ = 628213 is a prime.

It is a super-3 number, since 3×628215³ = 743782850333515125, which contains 333 as substring.

It is a plaindrome in base 9.

It is a nialpdrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (628213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3159 + ... + 3351.

It is an arithmetic number, because the mean of its divisors is an integer number (37248).

2⁶²⁸²¹⁵ is an apocalyptic number.

628215 is a deficient number, since it is larger than the sum of its proper divisors (563721).

628215 is a wasteful number, since it uses less digits than its factorization.

628215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239.

The product of its digits is 960, while the sum is 24.

The square root of 628215 is about 792.6001514004. The cubic root of 628215 is about 85.6451486141.

It can be divided in two parts, 62821 and 5, that added together give a palindrome (62826).

The spelling of 628215 in words is "six hundred twenty-eight thousand, two hundred fifteen".