628579 has 4 divisors (see below), whose sum is σ = 718384. Its totient is φ = 538776.

The previous prime is 628561. The next prime is 628583. The reversal of 628579 is 975826.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 628579 - 2⁵ = 628547 is a prime.

It is a super-2 number, since 2×628579² = 790223118482, which contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (628379) 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 3 ways as a sum of consecutive naturals, for example, 44892 + ... + 44905.

It is an arithmetic number, because the mean of its divisors is an integer number (179596).

2⁶²⁸⁵⁷⁹ is an apocalyptic number.

628579 is a deficient number, since it is larger than the sum of its proper divisors (89805).

628579 is an equidigital number, since it uses as much as digits as its factorization.

628579 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89804.

The product of its digits is 30240, while the sum is 37.

The square root of 628579 is about 792.8297421263. The cubic root of 628579 is about 85.6616869091.

The spelling of 628579 in words is "six hundred twenty-eight thousand, five hundred seventy-nine".