779494380 has 384 divisors, whose sum is σ = 2848849920. Its totient is φ = 155105280.

The previous prime is 779494379. The next prime is 779494427. The reversal of 779494380 is 83494977.

It is a happy number.

It is a super-2 number, since 2×779494380² = 1215222976903168800, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 5689672 + ... + 5689808.

It is an arithmetic number, because the mean of its divisors is an integer number (7418880).

Almost surely, 2^779494380 is an apocalyptic number.

779494380 is a gapful number since it is divisible by the number (70) 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 779494380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1424424960).

779494380 is an abundant number, since it is smaller than the sum of its proper divisors (2069355540).

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

779494380 is a wasteful number, since it uses less digits than its factorization.

779494380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229 (or 227 counting only the distinct ones).

The product of its (nonzero) digits is 1524096, while the sum is 51.

The square root of 779494380 is about 27919.4265700426. The cubic root of 779494380 is about 920.3174629048.

The spelling of 779494380 in words is "seven hundred seventy-nine million, four hundred ninety-four thousand, three hundred eighty".