768447920 has 20 divisors (see below), whose sum is σ = 1786641600. Its totient is φ = 307379136.

The previous prime is 768447899. The next prime is 768447937. The reversal of 768447920 is 29744867.

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-3 number, since 3×768447920³ (a number of 28 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4802720 + ... + 4802879.

It is an arithmetic number, because the mean of its divisors is an integer number (89332080).

Almost surely, 2^768447920 is an apocalyptic number.

It is an amenable number.

768447920 is an abundant number, since it is smaller than the sum of its proper divisors (1018193680).

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

768447920 is a wasteful number, since it uses less digits than its factorization.

768447920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9605612 (or 9605606 counting only the distinct ones).

The product of its (nonzero) digits is 677376, while the sum is 47.

The square root of 768447920 is about 27720.8932035027. The cubic root of 768447920 is about 915.9493943045.

The spelling of 768447920 in words is "seven hundred sixty-eight million, four hundred forty-seven thousand, nine hundred twenty".