628814117 has 4 divisors (see below), whose sum is σ = 629425056. Its totient is φ = 628203180.

The previous prime is 628814111. The next prime is 628814191. The reversal of 628814117 is 711418826.

It is a happy number.

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 an emirpimes, since its reverse is a distinct semiprime: 711418826 = 2 ⋅355709413.

It is a cyclic number.

It is not a de Polignac number, because 628814117 - 2¹⁰ = 628813093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (628814111) 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, 303923 + ... + 305984.

It is an arithmetic number, because the mean of its divisors is an integer number (157356264).

Almost surely, 2^628814117 is an apocalyptic number.

It is an amenable number.

628814117 is a deficient number, since it is larger than the sum of its proper divisors (610939).

628814117 is a wasteful number, since it uses less digits than its factorization.

628814117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 610938.

The product of its digits is 21504, while the sum is 38.

The square root of 628814117 is about 25076.1663138527. The cubic root of 628814117 is about 856.7236602724.

The spelling of 628814117 in words is "six hundred twenty-eight million, eight hundred fourteen thousand, one hundred seventeen".