628740 has 72 divisors (see below), whose sum is σ = 2184000. Its totient is φ = 143424.

The previous prime is 628721. The next prime is 628753. The reversal of 628740 is 47826.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1011 + ... + 1509.

2⁶²⁸⁷⁴⁰ is an apocalyptic number.

628740 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 628740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1092000).

628740 is an abundant number, since it is smaller than the sum of its proper divisors (1555260).

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

628740 is a wasteful number, since it uses less digits than its factorization.

628740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 521 (or 516 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 628740 is about 792.9312706660. The cubic root of 628740 is about 85.6689998877.

The spelling of 628740 in words is "six hundred twenty-eight thousand, seven hundred forty".