628385843 has 2 divisors, whose sum is σ = 628385844. Its totient is φ = 628385842.

The previous prime is 628385809. The next prime is 628385851. The reversal of 628385843 is 348583826.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 628385843 - 2⁸ = 628385587 is a prime.

It is not a weakly prime, because it can be changed into another prime (628385893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 314192921 + 314192922.

It is an arithmetic number, because the mean of its divisors is an integer number (314192922).

Almost surely, 2^628385843 is an apocalyptic number.

628385843 is a deficient number, since it is larger than the sum of its proper divisors (1).

628385843 is an equidigital number, since it uses as much as digits as its factorization.

628385843 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1105920, while the sum is 47.

The square root of 628385843 is about 25067.6253961160. The cubic root of 628385843 is about 856.5291164002.

The spelling of 628385843 in words is "six hundred twenty-eight million, three hundred eighty-five thousand, eight hundred forty-three".