628724 has 6 divisors (see below), whose sum is σ = 1100274. Its totient is φ = 314360.

The previous prime is 628721. The next prime is 628753. The reversal of 628724 is 427826.

It can be written as a sum of positive squares in only one way, i.e., 624100 + 4624 = 790^2 + 68^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (628721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78587 + ... + 78594.

It is an arithmetic number, because the mean of its divisors is an integer number (183379).

2⁶²⁸⁷²⁴ is an apocalyptic number.

It is an amenable number.

628724 is a deficient number, since it is larger than the sum of its proper divisors (471550).

628724 is a wasteful number, since it uses less digits than its factorization.

628724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157185 (or 157183 counting only the distinct ones).

The product of its digits is 5376, while the sum is 29.

The square root of 628724 is about 792.9211814550. The cubic root of 628724 is about 85.6682731879.

The spelling of 628724 in words is "six hundred twenty-eight thousand, seven hundred twenty-four".