628257041 has 4 divisors (see below), whose sum is σ = 628341684. Its totient is φ = 628172400.

The previous prime is 628257031. The next prime is 628257079. The reversal of 628257041 is 140752826.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 300502225 + 327754816 = 17335^2 + 18104^2 .

It is a cyclic number.

It is not a de Polignac number, because 628257041 - 2⁶ = 628256977 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 628256992 and 628257010.

It is not an unprimeable number, because it can be changed into a prime (628257001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29990 + ... + 46431.

It is an arithmetic number, because the mean of its divisors is an integer number (157085421).

Almost surely, 2^628257041 is an apocalyptic number.

It is an amenable number.

628257041 is a deficient number, since it is larger than the sum of its proper divisors (84643).

628257041 is an equidigital number, since it uses as much as digits as its factorization.

628257041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84642.

The product of its (nonzero) digits is 26880, while the sum is 35.

The square root of 628257041 is about 25065.0561738848. The cubic root of 628257041 is about 856.4705906802.

The spelling of 628257041 in words is "six hundred twenty-eight million, two hundred fifty-seven thousand, forty-one".