779484978 has 16 divisors (see below), whose sum is σ = 1732188960. Its totient is φ = 259828308.

The previous prime is 779484971. The next prime is 779484991. The reversal of 779484978 is 879484977.

It is a happy number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (779484971) 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, 7217400 + ... + 7217507.

It is an arithmetic number, because the mean of its divisors is an integer number (108261810).

Almost surely, 2^779484978 is an apocalyptic number.

779484978 is an abundant number, since it is smaller than the sum of its proper divisors (952703982).

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

779484978 is a wasteful number, since it uses less digits than its factorization.

779484978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14434918 (or 14434912 counting only the distinct ones).

The product of its digits is 28449792, while the sum is 63.

The square root of 779484978 is about 27919.2581921512. The cubic root of 779484978 is about 920.3137627029.

Subtracting 779484978 from its reverse (879484977), we obtain a palindrome (99999999).

The spelling of 779484978 in words is "seven hundred seventy-nine million, four hundred eighty-four thousand, nine hundred seventy-eight".