699728 has 20 divisors (see below), whose sum is σ = 1372308. Its totient is φ = 345600.

The previous prime is 699719. The next prime is 699733. The reversal of 699728 is 827996.

It can be written as a sum of positive squares in 2 ways, for example, as 399424 + 300304 = 632^2 + 548^2 .

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 699728.

It is an unprimeable number.

699728 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1400 + ... + 1832.

2⁶⁹⁹⁷²⁸ is an apocalyptic number.

It is an amenable number.

699728 is a deficient number, since it is larger than the sum of its proper divisors (672580).

699728 is a wasteful number, since it uses less digits than its factorization.

699728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 542 (or 536 counting only the distinct ones).

The product of its digits is 54432, while the sum is 41.

The square root of 699728 is about 836.4974596495. The cubic root of 699728 is about 88.7788982135.

The spelling of 699728 in words is "six hundred ninety-nine thousand, seven hundred twenty-eight".