778273860 has 192 divisors, whose sum is σ = 2737728000. Its totient is φ = 164150784.

The previous prime is 778273729. The next prime is 778273861. The reversal of 778273860 is 68372877.

It is not an unprimeable number, because it can be changed into a prime (778273861) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 266086 + ... + 268994.

It is an arithmetic number, because the mean of its divisors is an integer number (14259000).

Almost surely, 2^778273860 is an apocalyptic number.

778273860 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 778273860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1368864000).

778273860 is an abundant number, since it is smaller than the sum of its proper divisors (1959454140).

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

778273860 is a wasteful number, since it uses less digits than its factorization.

778273860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2955 (or 2939 counting only the distinct ones).

The product of its (nonzero) digits is 790272, while the sum is 48.

The square root of 778273860 is about 27897.5601083679. The cubic root of 778273860 is about 919.8368724634.

The spelling of 778273860 in words is "seven hundred seventy-eight million, two hundred seventy-three thousand, eight hundred sixty".