628336157 has 2 divisors, whose sum is σ = 628336158. Its totient is φ = 628336156.

The previous prime is 628336097. The next prime is 628336169. The reversal of 628336157 is 751633826.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 435515161 + 192820996 = 20869^2 + 13886^2 .

It is a cyclic number.

It is not a de Polignac number, because 628336157 - 2¹⁰ = 628335133 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (628336187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 314168078 + 314168079.

It is an arithmetic number, because the mean of its divisors is an integer number (314168079).

Almost surely, 2^628336157 is an apocalyptic number.

It is an amenable number.

628336157 is a deficient number, since it is larger than the sum of its proper divisors (1).

628336157 is an equidigital number, since it uses as much as digits as its factorization.

628336157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 181440, while the sum is 41.

The square root of 628336157 is about 25066.6343373018. The cubic root of 628336157 is about 856.5065407657.

The spelling of 628336157 in words is "six hundred twenty-eight million, three hundred thirty-six thousand, one hundred fifty-seven".