775749920 has 96 divisors (see below), whose sum is σ = 2006436096. Its totient is φ = 281088000.

The previous prime is 775749907. The next prime is 775749941. The reversal of 775749920 is 29947577.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 645320 + ... + 646520.

It is an arithmetic number, because the mean of its divisors is an integer number (20900376).

Almost surely, 2^775749920 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 775749920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1003218048).

775749920 is an abundant number, since it is smaller than the sum of its proper divisors (1230686176).

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

775749920 is a wasteful number, since it uses less digits than its factorization.

775749920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1594 (or 1586 counting only the distinct ones).

The product of its (nonzero) digits is 1111320, while the sum is 50.

The square root of 775749920 is about 27852.2875182632. The cubic root of 775749920 is about 918.8414528182.

The spelling of 775749920 in words is "seven hundred seventy-five million, seven hundred forty-nine thousand, nine hundred twenty".