775884240 has 120 divisors (see below), whose sum is σ = 2621160360. Its totient is φ = 205673472.

The previous prime is 775884227. The next prime is 775884251. The reversal of 775884240 is 42488577.

It can be written as a sum of positive squares in 4 ways, for example, as 222129216 + 553755024 = 14904^2 + 23532^2 .

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 121446 + ... + 127674.

It is an arithmetic number, because the mean of its divisors is an integer number (21843003).

Almost surely, 2^775884240 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 775884240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1310580180).

775884240 is an abundant number, since it is smaller than the sum of its proper divisors (1845276120).

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

775884240 is a wasteful number, since it uses less digits than its factorization.

775884240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6421 (or 6412 counting only the distinct ones).

The product of its (nonzero) digits is 501760, while the sum is 45.

The square root of 775884240 is about 27854.6987059634. The cubic root of 775884240 is about 918.8944817897.

The spelling of 775884240 in words is "seven hundred seventy-five million, eight hundred eighty-four thousand, two hundred forty".