628775848 has 8 divisors (see below), whose sum is σ = 1178954730. Its totient is φ = 314387920.

The previous prime is 628775839. The next prime is 628775869. The reversal of 628775848 is 848577826.

It can be written as a sum of positive squares in only one way, i.e., 410386564 + 218389284 = 20258^2 + 14778^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (55) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39298483 + ... + 39298498.

Almost surely, 2^628775848 is an apocalyptic number.

It is an amenable number.

628775848 is a deficient number, since it is larger than the sum of its proper divisors (550178882).

628775848 is a wasteful number, since it uses less digits than its factorization.

628775848 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78596987 (or 78596983 counting only the distinct ones).

The product of its digits is 6021120, while the sum is 55.

The square root of 628775848 is about 25075.4032470068. The cubic root of 628775848 is about 856.7062801373.

The spelling of 628775848 in words is "six hundred twenty-eight million, seven hundred seventy-five thousand, eight hundred forty-eight".