778252830 has 64 divisors (see below), whose sum is σ = 1935525888. Its totient is φ = 200062080.

The previous prime is 778252819. The next prime is 778252831. The reversal of 778252830 is 38252877.

778252830 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (778252831) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 261712 + ... + 264668.

It is an arithmetic number, because the mean of its divisors is an integer number (30242592).

Almost surely, 2^778252830 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 778252830, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (967762944).

778252830 is an abundant number, since it is smaller than the sum of its proper divisors (1157273058).

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

778252830 is a wasteful number, since it uses less digits than its factorization.

778252830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3281.

The product of its (nonzero) digits is 188160, while the sum is 42.

The square root of 778252830 is about 27897.1831911396. The cubic root of 778252830 is about 919.8285873148.

The spelling of 778252830 in words is "seven hundred seventy-eight million, two hundred fifty-two thousand, eight hundred thirty".