630828557 has 4 divisors (see below), whose sum is σ = 664030080. Its totient is φ = 597627036.

The previous prime is 630828491. The next prime is 630828559. The reversal of 630828557 is 755828036.

630828557 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 630828557 - 2⁸ = 630828301 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (630828559) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16600733 + ... + 16600770.

It is an arithmetic number, because the mean of its divisors is an integer number (166007520).

Almost surely, 2^630828557 is an apocalyptic number.

It is an amenable number.

630828557 is a deficient number, since it is larger than the sum of its proper divisors (33201523).

630828557 is a wasteful number, since it uses less digits than its factorization.

630828557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33201522.

The product of its (nonzero) digits is 403200, while the sum is 44.

The square root of 630828557 is about 25116.3006233004. The cubic root of 630828557 is about 857.6375385919.

The spelling of 630828557 in words is "six hundred thirty million, eight hundred twenty-eight thousand, five hundred fifty-seven".