628571144 has 8 divisors (see below), whose sum is σ = 1178570910. Its totient is φ = 314285568.

The previous prime is 628571137. The next prime is 628571147. The reversal of 628571144 is 441175826.

It can be written as a sum of positive squares in only one way, i.e., 584188900 + 44382244 = 24170^2 + 6662^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 628571098 and 628571107.

It is not an unprimeable number, because it can be changed into a prime (628571147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39285689 + ... + 39285704.

Almost surely, 2^628571144 is an apocalyptic number.

It is an amenable number.

628571144 is a deficient number, since it is larger than the sum of its proper divisors (549999766).

628571144 is a wasteful number, since it uses less digits than its factorization.

628571144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78571399 (or 78571395 counting only the distinct ones).

The product of its digits is 53760, while the sum is 38.

The square root of 628571144 is about 25071.3211458830. The cubic root of 628571144 is about 856.6133004013.

The spelling of 628571144 in words is "six hundred twenty-eight million, five hundred seventy-one thousand, one hundred forty-four".