628789057 has 8 divisors (see below), whose sum is σ = 678219584. Its totient is φ = 579510288.

The previous prime is 628789033. The next prime is 628789061. The reversal of 628789057 is 750987826.

628789057 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 628789057 - 2⁷ = 628788929 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 628788995 and 628789013.

It is not an unprimeable number, because it can be changed into a prime (628789067) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29253 + ... + 45970.

It is an arithmetic number, because the mean of its divisors is an integer number (84777448).

Almost surely, 2^628789057 is an apocalyptic number.

It is an amenable number.

628789057 is a deficient number, since it is larger than the sum of its proper divisors (49430527).

628789057 is a wasteful number, since it uses less digits than its factorization.

628789057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75879.

The product of its (nonzero) digits is 1693440, while the sum is 52.

The square root of 628789057 is about 25075.6666312184. Note that the first 4 decimals coincide. The cubic root of 628789057 is about 856.7122791771.

The spelling of 628789057 in words is "six hundred twenty-eight million, seven hundred eighty-nine thousand, fifty-seven".