628787226 has 8 divisors (see below), whose sum is σ = 1257574464. Its totient is φ = 209595740.

The previous prime is 628787221. The next prime is 628787227. The reversal of 628787226 is 622787826.

It is a happy number.

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

628787226 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (628787221) 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, 52398930 + ... + 52398941.

It is an arithmetic number, because the mean of its divisors is an integer number (157196808).

Almost surely, 2^628787226 is an apocalyptic number.

628787226 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

628787226 is a wasteful number, since it uses less digits than its factorization.

628787226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104797876.

The product of its digits is 903168, while the sum is 48.

The square root of 628787226 is about 25075.6301216939. The cubic root of 628787226 is about 856.7114476096.

The spelling of 628787226 in words is "six hundred twenty-eight million, seven hundred eighty-seven thousand, two hundred twenty-six".