628087828 has 24 divisors (see below), whose sum is σ = 1106703360. Its totient is φ = 311895360.

The previous prime is 628087783. The next prime is 628087843. The reversal of 628087828 is 828780826.

It is a super-4 number, since 4×628087828⁴ (a number of 36 digits) contains 4444 as substring. Note that it is a super-d number also for d = 3.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 429763 + ... + 431221.

It is an arithmetic number, because the mean of its divisors is an integer number (46112640).

Almost surely, 2^628087828 is an apocalyptic number.

It is an amenable number.

628087828 is a deficient number, since it is larger than the sum of its proper divisors (478615532).

628087828 is a wasteful number, since it uses less digits than its factorization.

628087828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2127 (or 2125 counting only the distinct ones).

The product of its (nonzero) digits is 688128, while the sum is 49.

The square root of 628087828 is about 25061.6804703914. The cubic root of 628087828 is about 856.3936906420.

The spelling of 628087828 in words is "six hundred twenty-eight million, eighty-seven thousand, eight hundred twenty-eight".