775274820 has 96 divisors (see below), whose sum is σ = 2204267520. Its totient is φ = 203575680.

The previous prime is 775274779. The next prime is 775274837. The reversal of 775274820 is 28472577.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 2045391 + ... + 2045769.

It is an arithmetic number, because the mean of its divisors is an integer number (22961120).

Almost surely, 2^775274820 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 775274820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1102133760).

775274820 is an abundant number, since it is smaller than the sum of its proper divisors (1428992700).

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

775274820 is a wasteful number, since it uses less digits than its factorization.

775274820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 825 (or 823 counting only the distinct ones).

The product of its (nonzero) digits is 219520, while the sum is 42.

The square root of 775274820 is about 27843.7572895613. The cubic root of 775274820 is about 918.6538362028.

The spelling of 775274820 in words is "seven hundred seventy-five million, two hundred seventy-four thousand, eight hundred twenty".