628538 has 8 divisors (see below), whose sum is σ = 950400. Its totient is φ = 311740.

The previous prime is 628499. The next prime is 628547. The reversal of 628538 is 835826.

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

It is a Curzon number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 938 + ... + 1461.

It is an arithmetic number, because the mean of its divisors is an integer number (118800).

2⁶²⁸⁵³⁸ is an apocalyptic number.

628538 is a deficient number, since it is larger than the sum of its proper divisors (321862).

628538 is a wasteful number, since it uses less digits than its factorization.

628538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2532.

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

The square root of 628538 is about 792.8038849552. The cubic root of 628538 is about 85.6598243983.

The spelling of 628538 in words is "six hundred twenty-eight thousand, five hundred thirty-eight".