628303826 has 4 divisors (see below), whose sum is σ = 942455742. Its totient is φ = 314151912.

The previous prime is 628303787. The next prime is 628303829.

It is a happy number.

628303826 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 480705625 + 147598201 = 21925^2 + 12149^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 628303826.

It is not an unprimeable number, because it can be changed into a prime (628303829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157075955 + ... + 157075958.

Almost surely, 2^628303826 is an apocalyptic number.

628303826 is a deficient number, since it is larger than the sum of its proper divisors (314151916).

628303826 is a wasteful number, since it uses less digits than its factorization.

628303826 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314151915.

The product of its (nonzero) digits is 82944, while the sum is 38.

The square root of 628303826 is about 25065.9894279081. The cubic root of 628303826 is about 856.4918500158.

The spelling of 628303826 in words is "six hundred twenty-eight million, three hundred three thousand, eight hundred twenty-six".