774390834 has 128 divisors (see below), whose sum is σ = 2139333120. Its totient is φ = 202549248.

The previous prime is 774390833. The next prime is 774390853. The reversal of 774390834 is 438093477.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 774390834.

It is not an unprimeable number, because it can be changed into a prime (774390833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 236134 + ... + 239390.

It is an arithmetic number, because the mean of its divisors is an integer number (16713540).

Almost surely, 2^774390834 is an apocalyptic number.

774390834 is a gapful number since it is divisible by the number (74) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 774390834, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1069666560).

774390834 is an abundant number, since it is smaller than the sum of its proper divisors (1364942286).

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

774390834 is a wasteful number, since it uses less digits than its factorization.

774390834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3329 (or 3323 counting only the distinct ones).

The product of its (nonzero) digits is 508032, while the sum is 45.

The square root of 774390834 is about 27827.8787190113. The cubic root of 774390834 is about 918.3045467404.

The spelling of 774390834 in words is "seven hundred seventy-four million, three hundred ninety thousand, eight hundred thirty-four".