626728 has 8 divisors (see below), whose sum is σ = 1175130. Its totient is φ = 313360.

The previous prime is 626723. The next prime is 626741. The reversal of 626728 is 827626.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 465124 + 161604 = 682^2 + 402^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 626728.

It is not an unprimeable number, because it can be changed into a prime (626723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39163 + ... + 39178.

2⁶²⁶⁷²⁸ is an apocalyptic number.

It is an amenable number.

626728 is a deficient number, since it is larger than the sum of its proper divisors (548402).

626728 is a wasteful number, since it uses less digits than its factorization.

626728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78347 (or 78343 counting only the distinct ones).

The product of its digits is 8064, while the sum is 31.

The square root of 626728 is about 791.6615438431. The cubic root of 626728 is about 85.5775205187.

The spelling of 626728 in words is "six hundred twenty-six thousand, seven hundred twenty-eight".