628619 has 4 divisors (see below), whose sum is σ = 634296. Its totient is φ = 622944.

The previous prime is 628591. The next prime is 628651. The reversal of 628619 is 916826.

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

It is a cyclic number.

It is not a de Polignac number, because 628619 - 2⁸ = 628363 is a prime.

It is a super-2 number, since 2×628619² = 790323694322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (628679) 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, 2669 + ... + 2894.

It is an arithmetic number, because the mean of its divisors is an integer number (158574).

2⁶²⁸⁶¹⁹ is an apocalyptic number.

628619 is a deficient number, since it is larger than the sum of its proper divisors (5677).

628619 is a wasteful number, since it uses less digits than its factorization.

628619 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5676.

The product of its digits is 5184, while the sum is 32.

The square root of 628619 is about 792.8549678220. The cubic root of 628619 is about 85.6635039148.

The spelling of 628619 in words is "six hundred twenty-eight thousand, six hundred nineteen".