628195338 has 28 divisors (see below), whose sum is σ = 1412796498. Its totient is φ = 209397960.

The previous prime is 628195313. The next prime is 628195427. The reversal of 628195338 is 833591826.

It is a happy number.

628195338 is a `hidden beast` number, since 628 + 19 + 5 + 3 + 3 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 615684969 + 12510369 = 24813^2 + 3537^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 628195293 and 628195302.

It is an unprimeable number.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 213973 + ... + 216888.

Almost surely, 2^628195338 is an apocalyptic number.

628195338 is an abundant number, since it is smaller than the sum of its proper divisors (784601160).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

628195338 is an equidigital number, since it uses as much as digits as its factorization.

628195338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 430881 (or 430866 counting only the distinct ones).

The product of its digits is 311040, while the sum is 45.

The square root of 628195338 is about 25063.8252866557. The cubic root of 628195338 is about 856.4425509175.

The spelling of 628195338 in words is "six hundred twenty-eight million, one hundred ninety-five thousand, three hundred thirty-eight".