616688 has 10 divisors (see below), whose sum is σ = 1194864. Its totient is φ = 308336.

The previous prime is 616673. The next prime is 616703. The reversal of 616688 is 886616.

It is an interprime number because it is at equal distance from previous prime (616673) and next prime (616703).

It is a congruent number.

It is an unprimeable number.

616688 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 as a sum of consecutive naturals, namely, 19256 + ... + 19287.

2⁶¹⁶⁶⁸⁸ is an apocalyptic number.

It is an amenable number.

616688 is a deficient number, since it is larger than the sum of its proper divisors (578176).

616688 is a wasteful number, since it uses less digits than its factorization.

616688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38551 (or 38545 counting only the distinct ones).

The product of its digits is 13824, while the sum is 35.

The square root of 616688 is about 785.2948490854. The cubic root of 616688 is about 85.1180827107.

It can be divided in two parts, 6 and 16688, that multiplied together give a triangular number (100128 = T₄₄₇).

The spelling of 616688 in words is "six hundred sixteen thousand, six hundred eighty-eight".