628442040431 has 2 divisors, whose sum is σ = 628442040432. Its totient is φ = 628442040430.

The previous prime is 628442040389. The next prime is 628442040451. The reversal of 628442040431 is 134040244826.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 628442040431 - 2¹⁸ = 628441778287 is a prime.

It is a super-2 number, since 2×628442040431² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (628442040451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 314221020215 + 314221020216.

It is an arithmetic number, because the mean of its divisors is an integer number (314221020216).

Almost surely, 2^628442040431 is an apocalyptic number.

628442040431 is a deficient number, since it is larger than the sum of its proper divisors (1).

628442040431 is an equidigital number, since it uses as much as digits as its factorization.

628442040431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 147456, while the sum is 38.

The spelling of 628442040431 in words is "six hundred twenty-eight billion, four hundred forty-two million, forty thousand, four hundred thirty-one".