781696 has 32 divisors (see below), whose sum is σ = 1615680. Its totient is φ = 376320.

The previous prime is 781681. The next prime is 781721. The reversal of 781696 is 696187.

781696 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (32).

It is a super-2 number, since 2×781696² = 1222097272832, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

781696 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, 3870 + ... + 4066.

It is an arithmetic number, because the mean of its divisors is an integer number (50490).

2⁷⁸¹⁶⁹⁶ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 781696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (807840).

781696 is an abundant number, since it is smaller than the sum of its proper divisors (833984).

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

781696 is a wasteful number, since it uses less digits than its factorization.

781696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242 (or 230 counting only the distinct ones).

The product of its digits is 18144, while the sum is 37.

The square root of 781696 is about 884.1357361853. The cubic root of 781696 is about 92.1183102978.

The spelling of 781696 in words is "seven hundred eighty-one thousand, six hundred ninety-six".