628511 has 6 divisors (see below), whose sum is σ = 680760. Its totient is φ = 580008.

The previous prime is 628499. The next prime is 628547. The reversal of 628511 is 115826.

It is not a de Polignac number, because 628511 - 2⁶ = 628447 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (628561) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1691 + ... + 2028.

It is an arithmetic number, because the mean of its divisors is an integer number (113460).

2⁶²⁸⁵¹¹ is an apocalyptic number.

628511 is a deficient number, since it is larger than the sum of its proper divisors (52249).

628511 is a wasteful number, since it uses less digits than its factorization.

628511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3745 (or 3732 counting only the distinct ones).

The product of its digits is 480, while the sum is 23.

The square root of 628511 is about 792.7868566014. The cubic root of 628511 is about 85.6585978226.

The spelling of 628511 in words is "six hundred twenty-eight thousand, five hundred eleven".