628539 has 8 divisors (see below), whose sum is σ = 882240. Its totient is φ = 396936.

The previous prime is 628499. The next prime is 628547. The reversal of 628539 is 935826.

It is a happy number.

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

It is not a de Polignac number, because 628539 - 2¹² = 624443 is a prime.

It is a super-2 number, since 2×628539² = 790122549042, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (628139) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5457 + ... + 5570.

It is an arithmetic number, because the mean of its divisors is an integer number (110280).

2⁶²⁸⁵³⁹ is an apocalyptic number.

628539 is a deficient number, since it is larger than the sum of its proper divisors (253701).

628539 is a wasteful number, since it uses less digits than its factorization.

628539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11049.

The product of its digits is 12960, while the sum is 33.

The square root of 628539 is about 792.8045156279. The cubic root of 628539 is about 85.6598698264.

The spelling of 628539 in words is "six hundred twenty-eight thousand, five hundred thirty-nine".