775454720 has 64 divisors (see below), whose sum is σ = 1861456140. Its totient is φ = 310116352.

The previous prime is 775454707. The next prime is 775454731. The reversal of 775454720 is 27454577.

It can be written as a sum of positive squares in 2 ways, for example, as 729432064 + 46022656 = 27008^2 + 6784^2 .

It is a tau number, because it is divible by the number of its divisors (64).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 161474 + ... + 166206.

Almost surely, 2^775454720 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 775454720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (930728070).

775454720 is an abundant number, since it is smaller than the sum of its proper divisors (1086001420).

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

775454720 is an frugal number, since it uses more digits than its factorization.

775454720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4768 (or 4740 counting only the distinct ones).

The product of its (nonzero) digits is 274400, while the sum is 41.

The square root of 775454720 is about 27846.9876288262. The cubic root of 775454720 is about 918.7248875855.

The spelling of 775454720 in words is "seven hundred seventy-five million, four hundred fifty-four thousand, seven hundred twenty".