628970 has 8 divisors (see below), whose sum is σ = 1132164. Its totient is φ = 251584.

The previous prime is 628939. The next prime is 628973. The reversal of 628970 is 79826.

628970 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 628849 + 121 = 793^2 + 11^2 .

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

It is not an unprimeable number, because it can be changed into a prime (628973) 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, 31439 + ... + 31458.

2⁶²⁸⁹⁷⁰ is an apocalyptic number.

628970 is a deficient number, since it is larger than the sum of its proper divisors (503194).

628970 is a wasteful number, since it uses less digits than its factorization.

628970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62904.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 628970 is about 793.0762888903. The cubic root of 628970 is about 85.6794448346.

The spelling of 628970 in words is "six hundred twenty-eight thousand, nine hundred seventy".