775213280 has 96 divisors (see below), whose sum is σ = 1917312768. Its totient is φ = 295833600.

The previous prime is 775213273. The next prime is 775213303. The reversal of 775213280 is 82312577.

It is a self number, because there is not a number n which added to its sum of digits gives 775213280.

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 15 ways as a sum of consecutive naturals, for example, 361010 + ... + 363150.

It is an arithmetic number, because the mean of its divisors is an integer number (19972008).

Almost surely, 2^775213280 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 775213280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (958656384).

775213280 is an abundant number, since it is smaller than the sum of its proper divisors (1142099488).

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

775213280 is a wasteful number, since it uses less digits than its factorization.

775213280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2260 (or 2252 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 35.

The square root of 775213280 is about 27842.6521725212. The cubic root of 775213280 is about 918.6295284986.

The spelling of 775213280 in words is "seven hundred seventy-five million, two hundred thirteen thousand, two hundred eighty".