628022641 has 2 divisors, whose sum is σ = 628022642. Its totient is φ = 628022640.

The previous prime is 628022597. The next prime is 628022657. The reversal of 628022641 is 146220826.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 373301041 + 254721600 = 19321^2 + 15960^2 .

It is a cyclic number.

It is not a de Polignac number, because 628022641 - 2¹³ = 628014449 is a prime.

It is a super-2 number, since 2×628022641² = 788824875217229762, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (628022671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 314011320 + 314011321.

It is an arithmetic number, because the mean of its divisors is an integer number (314011321).

Almost surely, 2^628022641 is an apocalyptic number.

It is an amenable number.

628022641 is a deficient number, since it is larger than the sum of its proper divisors (1).

628022641 is an equidigital number, since it uses as much as digits as its factorization.

628022641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9216, while the sum is 31.

The square root of 628022641 is about 25060.3799053406. The cubic root of 628022641 is about 856.3640622660.

The spelling of 628022641 in words is "six hundred twenty-eight million, twenty-two thousand, six hundred forty-one".