628811906834 has 4 divisors (see below), whose sum is σ = 943217860254. Its totient is φ = 314405953416.

The previous prime is 628811906819. The next prime is 628811906843. The reversal of 628811906834 is 438609118826.

It is a happy number.

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., 450647717809 + 178164189025 = 671303^2 + 422095^2 .

It is a super-2 number, since 2×628811906834² (a number of 24 digits) contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 628811906834.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157202976707 + ... + 157202976710.

Almost surely, 2^628811906834 is an apocalyptic number.

628811906834 is a deficient number, since it is larger than the sum of its proper divisors (314405953420).

628811906834 is a wasteful number, since it uses less digits than its factorization.

628811906834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314405953419.

The product of its (nonzero) digits is 3981312, while the sum is 56.

The spelling of 628811906834 in words is "six hundred twenty-eight billion, eight hundred eleven million, nine hundred six thousand, eight hundred thirty-four".