778090446 has 48 divisors (see below), whose sum is σ = 1937520000. Its totient is φ = 221063184.

The previous prime is 778090433. The next prime is 778090463. The reversal of 778090446 is 644090877.

It is a congruent number.

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 23 ways as a sum of consecutive naturals, for example, 5305 + ... + 39803.

It is an arithmetic number, because the mean of its divisors is an integer number (40365000).

Almost surely, 2^778090446 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 778090446, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (968760000).

778090446 is an abundant number, since it is smaller than the sum of its proper divisors (1159429554).

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

778090446 is a wasteful number, since it uses less digits than its factorization.

778090446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34693 (or 34690 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 45.

The square root of 778090446 is about 27894.2726379449. The cubic root of 778090446 is about 919.7646081771.

The spelling of 778090446 in words is "seven hundred seventy-eight million, ninety thousand, four hundred forty-six".