776500385 has 4 divisors (see below), whose sum is σ = 931800468. Its totient is φ = 621200304.

The previous prime is 776500367. The next prime is 776500411. The reversal of 776500385 is 583005677.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 583005677 = 1289 ⋅452293.

It can be written as a sum of positive squares in 2 ways, for example, as 530104576 + 246395809 = 23024^2 + 15697^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-776500385 is a prime.

It is a Duffinian 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 3 ways as a sum of consecutive naturals, for example, 77650034 + ... + 77650043.

It is an arithmetic number, because the mean of its divisors is an integer number (232950117).

Almost surely, 2^776500385 is an apocalyptic number.

It is an amenable number.

776500385 is a deficient number, since it is larger than the sum of its proper divisors (155300083).

776500385 is a wasteful number, since it uses less digits than its factorization.

776500385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155300082.

The product of its (nonzero) digits is 176400, while the sum is 41.

The square root of 776500385 is about 27865.7564943068. The cubic root of 776500385 is about 919.1376548508.

The spelling of 776500385 in words is "seven hundred seventy-six million, five hundred thousand, three hundred eighty-five".