628750834 has 4 divisors (see below), whose sum is σ = 943126254. Its totient is φ = 314375416.

The previous prime is 628750823. The next prime is 628750841. The reversal of 628750834 is 438057826.

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., 544055625 + 84695209 = 23325^2 + 9203^2 .

It is a super-2 number, since 2×628750834² = 790655222511391112, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157187707 + ... + 157187710.

Almost surely, 2^628750834 is an apocalyptic number.

628750834 is a deficient number, since it is larger than the sum of its proper divisors (314375420).

628750834 is a wasteful number, since it uses less digits than its factorization.

628750834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314375419.

The product of its (nonzero) digits is 322560, while the sum is 43.

The square root of 628750834 is about 25074.9044664182. The cubic root of 628750834 is about 856.6949194724.

It can be divided in two parts, 6287 and 50834, that added together give a square (57121 = 239²).

The spelling of 628750834 in words is "six hundred twenty-eight million, seven hundred fifty thousand, eight hundred thirty-four".