628805776 has 15 divisors (see below), whose sum is σ = 1218505561. Its totient is φ = 314352736.

The previous prime is 628805761. The next prime is 628805791. The reversal of 628805776 is 677508826.

The square root of 628805776 is 25076.

It is a perfect power (a square), and thus also a powerful number.

It is an interprime number because it is at equal distance from previous prime (628805761) and next prime (628805791).

It can be written as a sum of positive squares in only one way, i.e., 199487376 + 429318400 = 14124^2 + 20720^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 97170 + ... + 103438.

Almost surely, 2^628805776 is an apocalyptic number.

628805776 is the 25076-th square number.

It is an amenable number.

628805776 is a deficient number, since it is larger than the sum of its proper divisors (589699785).

628805776 is an frugal number, since it uses more digits than its factorization.

628805776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12546 (or 6271 counting only the distinct ones).

The product of its (nonzero) digits is 1128960, while the sum is 49.

The cubic root of 628805776 is about 856.7198722088.

Multiplying 628805776 by its sum of digits (49), we get a square (30811483024 = 175532²).

It can be divided in two parts, 628 and 805776, that added together give a square (806404 = 898²).

The spelling of 628805776 in words is "six hundred twenty-eight million, eight hundred five thousand, seven hundred seventy-six".