778777230 has 128 divisors (see below), whose sum is σ = 2374603776. Its totient is φ = 158745600.

The previous prime is 778777199. The next prime is 778777231. The reversal of 778777230 is 32777877.

It is a self number, because there is not a number n which added to its sum of digits gives 778777230.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (778777231) 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, 119250 + ... + 125610.

It is an arithmetic number, because the mean of its divisors is an integer number (18551592).

Almost surely, 2^778777230 is an apocalyptic number.

778777230 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 778777230, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1187301888).

778777230 is an abundant number, since it is smaller than the sum of its proper divisors (1595826546).

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

778777230 is a wasteful number, since it uses less digits than its factorization.

778777230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6442.

The product of its (nonzero) digits is 806736, while the sum is 48.

The square root of 778777230 is about 27906.5804067786. The cubic root of 778777230 is about 920.0351396471.

The spelling of 778777230 in words is "seven hundred seventy-eight million, seven hundred seventy-seven thousand, two hundred thirty".