778324536 has 96 divisors (see below), whose sum is σ = 2304806400. Its totient is φ = 235321920.

The previous prime is 778324499. The next prime is 778324541. The reversal of 778324536 is 635423877.

It is a junction number, because it is equal to n+sod(n) for n = 778324491 and 778324500.

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 23 ways as a sum of consecutive naturals, for example, 479935 + ... + 481553.

It is an arithmetic number, because the mean of its divisors is an integer number (24008400).

Almost surely, 2^778324536 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 778324536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1152403200).

778324536 is an abundant number, since it is smaller than the sum of its proper divisors (1526481864).

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

778324536 is a wasteful number, since it uses less digits than its factorization.

778324536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2249 (or 2242 counting only the distinct ones).

The product of its digits is 846720, while the sum is 45.

The square root of 778324536 is about 27898.4683450544. The cubic root of 778324536 is about 919.8568365763.

The spelling of 778324536 in words is "seven hundred seventy-eight million, three hundred twenty-four thousand, five hundred thirty-six".