628256806 has 8 divisors (see below), whose sum is σ = 960166224. Its totient is φ = 308201400.

The previous prime is 628256779. The next prime is 628256807. The reversal of 628256806 is 608652826.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×628256806² = 789413228570643272, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (628256807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2963370 + ... + 2963581.

It is an arithmetic number, because the mean of its divisors is an integer number (120020778).

Almost surely, 2^628256806 is an apocalyptic number.

628256806 is a deficient number, since it is larger than the sum of its proper divisors (331909418).

628256806 is a wasteful number, since it uses less digits than its factorization.

628256806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5927006.

The product of its (nonzero) digits is 276480, while the sum is 43.

The square root of 628256806 is about 25065.0514860832. The cubic root of 628256806 is about 856.4704838923.

The spelling of 628256806 in words is "six hundred twenty-eight million, two hundred fifty-six thousand, eight hundred six".