775770940 has 72 divisors (see below), whose sum is σ = 1927361520. Its totient is φ = 261451008.

The previous prime is 775770929. The next prime is 775770949. The reversal of 775770940 is 49077577.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (775770949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 51112 + ... + 64528.

It is an arithmetic number, because the mean of its divisors is an integer number (26768910).

Almost surely, 2^775770940 is an apocalyptic number.

775770940 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 775770940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (963680760).

775770940 is an abundant number, since it is smaller than the sum of its proper divisors (1151590580).

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

775770940 is a wasteful number, since it uses less digits than its factorization.

775770940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13499 (or 13490 counting only the distinct ones).

The product of its (nonzero) digits is 432180, while the sum is 46.

The square root of 775770940 is about 27852.6648635279. The cubic root of 775770940 is about 918.8497518298.

The spelling of 775770940 in words is "seven hundred seventy-five million, seven hundred seventy thousand, nine hundred forty".