797075784 has 72 divisors (see below), whose sum is σ = 2184831090. Its totient is φ = 262499328.

The previous prime is 797075779. The next prime is 797075801. The reversal of 797075784 is 487570797.

It can be written as a sum of positive squares in 3 ways, for example, as 16990884 + 780084900 = 4122^2 + 27930^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is a self number, because there is not a number n which added to its sum of digits gives 797075784.

It is a congruent number.

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 17 ways as a sum of consecutive naturals, for example, 2546412 + ... + 2546724.

Almost surely, 2^797075784 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 797075784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1092415545).

797075784 is an abundant number, since it is smaller than the sum of its proper divisors (1387755306).

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

797075784 is a wasteful number, since it uses less digits than its factorization.

797075784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 751 (or 431 counting only the distinct ones).

The product of its (nonzero) digits is 3457440, while the sum is 54.

The square root of 797075784 is about 28232.5305985843. The cubic root of 797075784 is about 927.1853017502.

It can be divided in two parts, 79707 and 5784, that added together give a triangular number (85491 = T₄₁₃).

The spelling of 797075784 in words is "seven hundred ninety-seven million, seventy-five thousand, seven hundred eighty-four".