628662005 has 24 divisors (see below), whose sum is σ = 787558968. Its totient is φ = 481396608.

The previous prime is 628661993. The next prime is 628662007. The reversal of 628662005 is 500266826.

It can be written as a sum of positive squares in 4 ways, for example, as 205578244 + 423083761 = 14338^2 + 20569^2 .

It is not a de Polignac number, because 628662005 - 2⁶ = 628661941 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (628662007) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 830087 + ... + 830843.

It is an arithmetic number, because the mean of its divisors is an integer number (32814957).

Almost surely, 2^628662005 is an apocalyptic number.

It is an amenable number.

628662005 is a deficient number, since it is larger than the sum of its proper divisors (158896963).

628662005 is an equidigital number, since it uses as much as digits as its factorization.

628662005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 933 (or 866 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 35.

The square root of 628662005 is about 25073.1331309033. The cubic root of 628662005 is about 856.6545733698.

The spelling of 628662005 in words is "six hundred twenty-eight million, six hundred sixty-two thousand, five".