779315880 has 256 divisors, whose sum is σ = 2762035200. Its totient is φ = 172247040.

The previous prime is 779315879. The next prime is 779315893. The reversal of 779315880 is 88513977.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4353631 + ... + 4353809.

It is an arithmetic number, because the mean of its divisors is an integer number (10789200).

Almost surely, 2^779315880 is an apocalyptic number.

779315880 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 779315880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1381017600).

779315880 is an abundant number, since it is smaller than the sum of its proper divisors (1982719320).

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

779315880 is a wasteful number, since it uses less digits than its factorization.

779315880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 344 (or 340 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 48.

The square root of 779315880 is about 27916.2296881223. The cubic root of 779315880 is about 920.2472083002.

The spelling of 779315880 in words is "seven hundred seventy-nine million, three hundred fifteen thousand, eight hundred eighty".