628638698 has 4 divisors (see below), whose sum is σ = 942958050. Its totient is φ = 314319348.

The previous prime is 628638683. The next prime is 628638701. The reversal of 628638698 is 896836826.

628638698 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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., 381928849 + 246709849 = 19543^2 + 15707^2 .

It is a super-2 number, since 2×628638698² = 790373225246270408, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157159673 + ... + 157159676.

Almost surely, 2^628638698 is an apocalyptic number.

628638698 is a deficient number, since it is larger than the sum of its proper divisors (314319352).

628638698 is a wasteful number, since it uses less digits than its factorization.

628638698 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314319351.

The product of its digits is 5971968, while the sum is 56.

The square root of 628638698 is about 25072.6683462291. The cubic root of 628638698 is about 856.6439867086.

The spelling of 628638698 in words is "six hundred twenty-eight million, six hundred thirty-eight thousand, six hundred ninety-eight".