628099 has 4 divisors (see below), whose sum is σ = 665064. Its totient is φ = 591136.

The previous prime is 628097. The next prime is 628127. The reversal of 628099 is 990826.

628099 = T₅₆ + T₅₇ + ... + T₁₅₇.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 990826 = 2 ⋅495413.

It is a cyclic number.

It is not a de Polignac number, because 628099 - 2¹ = 628097 is a prime.

It is a Duffinian number.

It is a plaindrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (628093) 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, 18457 + ... + 18490.

It is an arithmetic number, because the mean of its divisors is an integer number (166266).

2⁶²⁸⁰⁹⁹ is an apocalyptic number.

628099 is a deficient number, since it is larger than the sum of its proper divisors (36965).

628099 is a wasteful number, since it uses less digits than its factorization.

628099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36964.

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 628099 is about 792.5269711499. The cubic root of 628099 is about 85.6398768262.

The spelling of 628099 in words is "six hundred twenty-eight thousand, ninety-nine".