628687492 has 6 divisors (see below), whose sum is σ = 1100203118. Its totient is φ = 314343744.

The previous prime is 628687483. The next prime is 628687511. The reversal of 628687492 is 294786826.

It can be written as a sum of positive squares in only one way, i.e., 343212676 + 285474816 = 18526^2 + 16896^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78585933 + ... + 78585940.

Almost surely, 2^628687492 is an apocalyptic number.

It is an amenable number.

628687492 is a deficient number, since it is larger than the sum of its proper divisors (471515626).

628687492 is a wasteful number, since it uses less digits than its factorization.

628687492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157171877 (or 157171875 counting only the distinct ones).

The product of its digits is 2322432, while the sum is 52.

The square root of 628687492 is about 25073.6413789461. The cubic root of 628687492 is about 856.6661499456. Note that the first 3 decimals are identical.

The spelling of 628687492 in words is "six hundred twenty-eight million, six hundred eighty-seven thousand, four hundred ninety-two".