628255427 has 4 divisors (see below), whose sum is σ = 628321896. Its totient is φ = 628188960.

The previous prime is 628255421. The next prime is 628255477. The reversal of 628255427 is 724552826.

628255427 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 724552826 = 2 ⋅362276413.

It is a cyclic number.

It is not a de Polignac number, because 628255427 - 2⁶ = 628255363 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (628255421) 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, 16118 + ... + 38939.

It is an arithmetic number, because the mean of its divisors is an integer number (157080474).

Almost surely, 2^628255427 is an apocalyptic number.

628255427 is a deficient number, since it is larger than the sum of its proper divisors (66469).

628255427 is a wasteful number, since it uses less digits than its factorization.

628255427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66468.

The product of its digits is 268800, while the sum is 41.

The square root of 628255427 is about 25065.0239776466. The cubic root of 628255427 is about 856.4698572517.

The spelling of 628255427 in words is "six hundred twenty-eight million, two hundred fifty-five thousand, four hundred twenty-seven".