628237 has 4 divisors (see below), whose sum is σ = 629856. Its totient is φ = 626620.

The previous prime is 628231. The next prime is 628261. The reversal of 628237 is 732826.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 628237 - 2¹¹ = 626189 is a prime.

It is a Duffinian number.

628237 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (628231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 162 + ... + 1132.

It is an arithmetic number, because the mean of its divisors is an integer number (157464).

2⁶²⁸²³⁷ is an apocalyptic number.

It is an amenable number.

628237 is a deficient number, since it is larger than the sum of its proper divisors (1619).

628237 is an equidigital number, since it uses as much as digits as its factorization.

628237 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1618.

The product of its digits is 4032, while the sum is 28.

The square root of 628237 is about 792.6140296513. The cubic root of 628237 is about 85.6461483628.

The spelling of 628237 in words is "six hundred twenty-eight thousand, two hundred thirty-seven".