628271401 has 2 divisors, whose sum is σ = 628271402. Its totient is φ = 628271400.

The previous prime is 628271377. The next prime is 628271411. The reversal of 628271401 is 104172826.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 523311376 + 104960025 = 22876^2 + 10245^2 .

It is a cyclic number.

It is not a de Polignac number, because 628271401 - 2¹⁷ = 628140329 is a prime.

It is not a weakly prime, because it can be changed into another prime (628271411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 314135700 + 314135701.

It is an arithmetic number, because the mean of its divisors is an integer number (314135701).

Almost surely, 2^628271401 is an apocalyptic number.

It is an amenable number.

628271401 is a deficient number, since it is larger than the sum of its proper divisors (1).

628271401 is an equidigital number, since it uses as much as digits as its factorization.

628271401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 628271401 is about 25065.3426268224. The cubic root of 628271401 is about 856.4771160475.

The spelling of 628271401 in words is "six hundred twenty-eight million, two hundred seventy-one thousand, four hundred one".