628695385 has 4 divisors (see below), whose sum is σ = 754434468. Its totient is φ = 502956304.

The previous prime is 628695383. The next prime is 628695439. The reversal of 628695385 is 583596826.

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 478559376 + 150136009 = 21876^2 + 12253^2 .

It is a cyclic number.

It is not a de Polignac number, because 628695385 - 2¹ = 628695383 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (628695383) 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, 62869534 + ... + 62869543.

It is an arithmetic number, because the mean of its divisors is an integer number (188608617).

Almost surely, 2^628695385 is an apocalyptic number.

It is an amenable number.

628695385 is a deficient number, since it is larger than the sum of its proper divisors (125739083).

628695385 is a wasteful number, since it uses less digits than its factorization.

628695385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125739082.

The product of its digits is 3110400, while the sum is 52.

The square root of 628695385 is about 25073.7987748167. The cubic root of 628695385 is about 856.6697350006.

The spelling of 628695385 in words is "six hundred twenty-eight million, six hundred ninety-five thousand, three hundred eighty-five".