1768697856 has 156 divisors (see below), whose sum is σ = 5301149672. Its totient is φ = 589234176.

The previous prime is 1768697831. The next prime is 1768697857. The reversal of 1768697856 is 6587968671.

It is a junction number, because it is equal to n+sod(n) for n = 1768697793 and 1768697802.

It is not an unprimeable number, because it can be changed into a prime (1768697857) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 994440 + ... + 996216.

Almost surely, 2^1768697856 is an apocalyptic number.

1768697856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1768697856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2650574836).

1768697856 is an abundant number, since it is smaller than the sum of its proper divisors (3532451816).

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

1768697856 is an frugal number, since it uses more digits than its factorization.

1768697856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1816 (or 1782 counting only the distinct ones).

The product of its digits is 30481920, while the sum is 63.

The square root of 1768697856 is about 42055.8896707703. The cubic root of 1768697856 is about 1209.3477932225.

The spelling of 1768697856 in words is "one billion, seven hundred sixty-eight million, six hundred ninety-seven thousand, eight hundred fifty-six".