628734814 has 16 divisors (see below), whose sum is σ = 993242880. Its totient is φ = 297670680.

The previous prime is 628734809. The next prime is 628734859. The reversal of 628734814 is 418437826.

It is a super-2 number, since 2×628734814² = 790614932671229192, which contains 22 as substring.

It is a congruent number.

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 in 7 ways as a sum of consecutive naturals, for example, 117579 + ... + 122809.

It is an arithmetic number, because the mean of its divisors is an integer number (62077680).

Almost surely, 2^628734814 is an apocalyptic number.

628734814 is a deficient number, since it is larger than the sum of its proper divisors (364508066).

628734814 is a wasteful number, since it uses less digits than its factorization.

628734814 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8415.

The product of its digits is 258048, while the sum is 43.

The square root of 628734814 is about 25074.5850214914. The cubic root of 628734814 is about 856.6876434746.

The spelling of 628734814 in words is "six hundred twenty-eight million, seven hundred thirty-four thousand, eight hundred fourteen".