628290 has 64 divisors (see below), whose sum is σ = 1814400. Its totient is φ = 153792.

The previous prime is 628289. The next prime is 628301. The reversal of 628290 is 92826.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a nialpdrome in base 16.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3421 + ... + 3599.

It is an arithmetic number, because the mean of its divisors is an integer number (28350).

2⁶²⁸²⁹⁰ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 628290, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (907200).

628290 is an abundant number, since it is smaller than the sum of its proper divisors (1186110).

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

628290 is a wasteful number, since it uses less digits than its factorization.

628290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208 (or 202 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 628290 is about 792.6474626213. The cubic root of 628290 is about 85.6485567523.

The spelling of 628290 in words is "six hundred twenty-eight thousand, two hundred ninety".