768209281 has 8 divisors (see below), whose sum is σ = 901682240. Its totient is φ = 640668528.

The previous prime is 768209263. The next prime is 768209291. The reversal of 768209281 is 182902867.

768209281 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 768209281 - 2⁵ = 768209249 is a prime.

It is a super-2 number, since 2×768209281² = 1180290998829073922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (768209291) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1482771 + ... + 1483288.

It is an arithmetic number, because the mean of its divisors is an integer number (112710280).

Almost surely, 2^768209281 is an apocalyptic number.

It is an amenable number.

768209281 is a deficient number, since it is larger than the sum of its proper divisors (133472959).

768209281 is a wasteful number, since it uses less digits than its factorization.

768209281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2966103.

The product of its (nonzero) digits is 96768, while the sum is 43.

The square root of 768209281 is about 27716.5885527061. The cubic root of 768209281 is about 915.8545694537.

The spelling of 768209281 in words is "seven hundred sixty-eight million, two hundred nine thousand, two hundred eighty-one".