628490 has 16 divisors (see below), whose sum is σ = 1198152. Its totient is φ = 236544.

The previous prime is 628487. The next prime is 628493. The reversal of 628490 is 94826.

It is an interprime number because it is at equal distance from previous prime (628487) and next prime (628493).

It can be written as a sum of positive squares in 4 ways, for example, as 452929 + 175561 = 673^2 + 419^2 .

It is not an unprimeable number, because it can be changed into a prime (628493) 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, 1679 + ... + 2018.

2⁶²⁸⁴⁹⁰ is an apocalyptic number.

628490 is a deficient number, since it is larger than the sum of its proper divisors (569662).

628490 is a wasteful number, since it uses less digits than its factorization.

628490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3721.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 628490 is about 792.7736120735. The cubic root of 628490 is about 85.6576437949.

It can be divided in two parts, 628 and 490, that multiplied together give a triangular number (307720 = T₇₈₄).

The spelling of 628490 in words is "six hundred twenty-eight thousand, four hundred ninety".