628914860 has 24 divisors (see below), whose sum is σ = 1509396000. Its totient is φ = 215627904.

The previous prime is 628914859. The next prime is 628914899. The reversal of 628914860 is 68419826.

It is a happy number.

It is a super-2 number, since 2×628914860² = 791067802257639200, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2245985 + ... + 2246264.

It is an arithmetic number, because the mean of its divisors is an integer number (62891500).

Almost surely, 2^628914860 is an apocalyptic number.

It is an amenable number.

628914860 is an abundant number, since it is smaller than the sum of its proper divisors (880481140).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

628914860 is a wasteful number, since it uses less digits than its factorization.

628914860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4492265 (or 4492263 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 44.

The square root of 628914860 is about 25078.1749734705. The cubic root of 628914860 is about 856.7694100420.

The spelling of 628914860 in words is "six hundred twenty-eight million, nine hundred fourteen thousand, eight hundred sixty".