628397 has 8 divisors (see below), whose sum is σ = 783552. Its totient is φ = 489600.

The previous prime is 628391. The next prime is 628399. The reversal of 628397 is 793826.

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-628397 is a prime.

It is a plaindrome in base 9.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (628391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4004 + ... + 4157.

It is an arithmetic number, because the mean of its divisors is an integer number (97944).

2⁶²⁸³⁹⁷ is an apocalyptic number.

It is an amenable number.

628397 is a deficient number, since it is larger than the sum of its proper divisors (155155).

628397 is a wasteful number, since it uses less digits than its factorization.

628397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8179.

The product of its digits is 18144, while the sum is 35.

The square root of 628397 is about 792.7149550753. The cubic root of 628397 is about 85.6534185599.

The spelling of 628397 in words is "six hundred twenty-eight thousand, three hundred ninety-seven".