628886774 has 4 divisors (see below), whose sum is σ = 943330164. Its totient is φ = 314443386.

The previous prime is 628886773. The next prime is 628886777. The reversal of 628886774 is 477688826.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (628886773) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157221692 + ... + 157221695.

It is an arithmetic number, because the mean of its divisors is an integer number (235832541).

Almost surely, 2^628886774 is an apocalyptic number.

628886774 is a deficient number, since it is larger than the sum of its proper divisors (314443390).

628886774 is a wasteful number, since it uses less digits than its factorization.

628886774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314443389.

The product of its digits is 7225344, while the sum is 56.

The square root of 628886774 is about 25077.6149982410. The cubic root of 628886774 is about 856.7566560189.

The spelling of 628886774 in words is "six hundred twenty-eight million, eight hundred eighty-six thousand, seven hundred seventy-four".