628040 has 32 divisors (see below), whose sum is σ = 1615680. Its totient is φ = 215232.

The previous prime is 628037. The next prime is 628049. The reversal of 628040 is 40826.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (628049) 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, 842 + ... + 1401.

It is an arithmetic number, because the mean of its divisors is an integer number (50490).

2⁶²⁸⁰⁴⁰ is an apocalyptic number.

It is an amenable number.

628040 is an abundant number, since it is smaller than the sum of its proper divisors (987640).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

628040 is a wasteful number, since it uses less digits than its factorization.

628040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2261 (or 2257 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 628040 is about 792.4897475678. The cubic root of 628040 is about 85.6371952367.

Adding to 628040 its reverse (40826), we get a palindrome (668866).

The spelling of 628040 in words is "six hundred twenty-eight thousand, forty".