775489960 has 64 divisors (see below), whose sum is σ = 1997550720. Its totient is φ = 265424640.

The previous prime is 775489943. The next prime is 775489961. The reversal of 775489960 is 69984577.

It is a super-3 number, since 3×775489960³ (a number of 28 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (775489961) by changing a digit.

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, 187515 + ... + 191605.

It is an arithmetic number, because the mean of its divisors is an integer number (31211730).

Almost surely, 2^775489960 is an apocalyptic number.

775489960 is a gapful number since it is divisible by the number (70) 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 775489960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (998775360).

775489960 is an abundant number, since it is smaller than the sum of its proper divisors (1222060760).

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

775489960 is a wasteful number, since it uses less digits than its factorization.

775489960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4786 (or 4782 counting only the distinct ones).

The product of its (nonzero) digits is 3810240, while the sum is 55.

The square root of 775489960 is about 27847.6203651228. The cubic root of 775489960 is about 918.7388043123.

The spelling of 775489960 in words is "seven hundred seventy-five million, four hundred eighty-nine thousand, nine hundred sixty".