768444921 has 8 divisors (see below), whose sum is σ = 1138436960. Its totient is φ = 512296596.

The previous prime is 768444913. The next prime is 768444967. The reversal of 768444921 is 129444867.

It is not a de Polignac number, because 768444921 - 2³ = 768444913 is a prime.

It is a super-2 number, since 2×768444921² = 1181015193221392482, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (768444991) 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, 14230435 + ... + 14230488.

It is an arithmetic number, because the mean of its divisors is an integer number (142304620).

Almost surely, 2^768444921 is an apocalyptic number.

It is an amenable number.

768444921 is a deficient number, since it is larger than the sum of its proper divisors (369992039).

768444921 is a wasteful number, since it uses less digits than its factorization.

768444921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28460932 (or 28460926 counting only the distinct ones).

The product of its digits is 387072, while the sum is 45.

The square root of 768444921 is about 27720.8391106763. The cubic root of 768444921 is about 915.9482027530.

The spelling of 768444921 in words is "seven hundred sixty-eight million, four hundred forty-four thousand, nine hundred twenty-one".