628992001 has 10 divisors (see below), whose sum is σ = 691903010. Its totient is φ = 571797600.

The previous prime is 628991999. The next prime is 628992019. The reversal of 628992001 is 100299826.

It can be written as a sum of positive squares in only one way, i.e., 418161601 + 210830400 = 20449^2 + 14520^2 .

It is not a de Polignac number, because 628992001 - 2¹ = 628991999 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 (628992901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 6840 + ... + 36121.

It is an arithmetic number, because the mean of its divisors is an integer number (69190301).

Almost surely, 2^628992001 is an apocalyptic number.

It is an amenable number.

628992001 is a deficient number, since it is larger than the sum of its proper divisors (62911009).

628992001 is an frugal number, since it uses more digits than its factorization.

628992001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43005 (or 42972 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 628992001 is about 25079.7129369536. The cubic root of 628992001 is about 856.8044382846.

The spelling of 628992001 in words is "six hundred twenty-eight million, nine hundred ninety-two thousand, one".