628086890 has 16 divisors (see below), whose sum is σ = 1146044808. Its totient is φ = 247792896.

The previous prime is 628086889. The next prime is 628086911. The reversal of 628086890 is 98680826.

It can be written as a sum of positive squares in 4 ways, for example, as 616479241 + 11607649 = 24829^2 + 3407^2 .

It is a Curzon number.

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, 429467 + ... + 430926.

Almost surely, 2^628086890 is an apocalyptic number.

628086890 is a deficient number, since it is larger than the sum of its proper divisors (517957918).

628086890 is a wasteful number, since it uses less digits than its factorization.

628086890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 860473.

The product of its (nonzero) digits is 331776, while the sum is 47.

The square root of 628086890 is about 25061.6617565556. The cubic root of 628086890 is about 856.3932643228.

The spelling of 628086890 in words is "six hundred twenty-eight million, eighty-six thousand, eight hundred ninety".