628689514 has 8 divisors (see below), whose sum is σ = 946253700. Its totient is φ = 313271616.

The previous prime is 628689493. The next prime is 628689539. The reversal of 628689514 is 415986826.

It can be written as a sum of positive squares in 2 ways, for example, as 625850289 + 2839225 = 25017^2 + 1685^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 535839 + ... + 537010.

Almost surely, 2^628689514 is an apocalyptic number.

628689514 is a deficient number, since it is larger than the sum of its proper divisors (317564186).

628689514 is a wasteful number, since it uses less digits than its factorization.

628689514 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1073144.

The product of its digits is 829440, while the sum is 49.

The square root of 628689514 is about 25073.6817001413. The cubic root of 628689514 is about 856.6670683548.

The spelling of 628689514 in words is "six hundred twenty-eight million, six hundred eighty-nine thousand, five hundred fourteen".