628512227890 has 32 divisors (see below), whose sum is σ = 1164022784064. Its totient is φ = 244162900800.

The previous prime is 628512227881. The next prime is 628512227897. The reversal of 628512227890 is 98722215826.

It is a Smith number, since the sum of its digits (52) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (628512227897) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1350336 + ... + 1755115.

It is an arithmetic number, because the mean of its divisors is an integer number (36375712002).

Almost surely, 2^628512227890 is an apocalyptic number.

628512227890 is a deficient number, since it is larger than the sum of its proper divisors (535510556174).

628512227890 is a wasteful number, since it uses less digits than its factorization.

628512227890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3106042.

The product of its (nonzero) digits is 1935360, while the sum is 52.

The spelling of 628512227890 in words is "six hundred twenty-eight billion, five hundred twelve million, two hundred twenty-seven thousand, eight hundred ninety".