774299856 has 160 divisors (see below), whose sum is σ = 2328422400. Its totient is φ = 219248640.

The previous prime is 774299821. The next prime is 774299879. The reversal of 774299856 is 658992477.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a junction number, because it is equal to n+sod(n) for n = 774299796 and 774299805.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 792040 + ... + 793016.

It is an arithmetic number, because the mean of its divisors is an integer number (14552640).

Almost surely, 2^774299856 is an apocalyptic number.

774299856 is a gapful number since it is divisible by the number (76) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 774299856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1164211200).

774299856 is an abundant number, since it is smaller than the sum of its proper divisors (1554122544).

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

774299856 is a wasteful number, since it uses less digits than its factorization.

774299856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1097 (or 1091 counting only the distinct ones).

The product of its digits is 7620480, while the sum is 57.

The square root of 774299856 is about 27826.2440153176. The cubic root of 774299856 is about 918.2685835121.

The spelling of 774299856 in words is "seven hundred seventy-four million, two hundred ninety-nine thousand, eight hundred fifty-six".