628145 has 16 divisors (see below), whose sum is σ = 874368. Its totient is φ = 424320.

The previous prime is 628139. The next prime is 628171. The reversal of 628145 is 541826.

628145 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 628145 - 2¹² = 624049 is a prime.

It is a super-2 number, since 2×628145² = 789132282050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4517 + ... + 4653.

It is an arithmetic number, because the mean of its divisors is an integer number (54648).

2⁶²⁸¹⁴⁵ is an apocalyptic number.

It is an amenable number.

628145 is a deficient number, since it is larger than the sum of its proper divisors (246223).

628145 is a wasteful number, since it uses less digits than its factorization.

628145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280.

The product of its digits is 1920, while the sum is 26.

The square root of 628145 is about 792.5559917129. Note that the first 3 decimals coincide. The cubic root of 628145 is about 85.6419674404.

The spelling of 628145 in words is "six hundred twenty-eight thousand, one hundred forty-five".