628385 has 8 divisors (see below), whose sum is σ = 761640. Its totient is φ = 497664.

The previous prime is 628379. The next prime is 628391. The reversal of 628385 is 583826.

It is an interprime number because it is at equal distance from previous prime (628379) and next prime (628391).

It can be written as a sum of positive squares in 4 ways, for example, as 187489 + 440896 = 433^2 + 664^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-628385 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32 + ... + 1121.

It is an arithmetic number, because the mean of its divisors is an integer number (95205).

2⁶²⁸³⁸⁵ is an apocalyptic number.

It is an amenable number.

628385 is a deficient number, since it is larger than the sum of its proper divisors (133255).

628385 is a wasteful number, since it uses less digits than its factorization.

628385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1267.

The product of its digits is 11520, while the sum is 32.

The square root of 628385 is about 792.7073861142. The cubic root of 628385 is about 85.6528733380.

The spelling of 628385 in words is "six hundred twenty-eight thousand, three hundred eighty-five".