774393984 has 384 divisors, whose sum is σ = 2806876800. Its totient is φ = 199507968.

The previous prime is 774393953. The next prime is 774394003. The reversal of 774393984 is 489393477.

It is a tau number, because it is divible by the number of its divisors (384).

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 774393984.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8701012 + ... + 8701100.

It is an arithmetic number, because the mean of its divisors is an integer number (7309575).

Almost surely, 2^774393984 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 774393984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1403438400).

774393984 is an abundant number, since it is smaller than the sum of its proper divisors (2032482816).

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

774393984 is a wasteful number, since it uses less digits than its factorization.

774393984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212 (or 197 counting only the distinct ones).

The product of its digits is 4572288, while the sum is 54.

The square root of 774393984 is about 27827.9353168718. The cubic root of 774393984 is about 918.3057918720.

The spelling of 774393984 in words is "seven hundred seventy-four million, three hundred ninety-three thousand, nine hundred eighty-four".