776816 has 20 divisors (see below), whose sum is σ = 1538592. Its totient is φ = 379776.

The previous prime is 776813. The next prime is 776819. The reversal of 776816 is 618677.

It is an interprime number because it is at equal distance from previous prime (776813) and next prime (776819).

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (776813) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 236 + ... + 1268.

2⁷⁷⁶⁸¹⁶ is an apocalyptic number.

It is an amenable number.

776816 is a deficient number, since it is larger than the sum of its proper divisors (761776).

776816 is a wasteful number, since it uses less digits than its factorization.

776816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1088 (or 1082 counting only the distinct ones).

The product of its digits is 14112, while the sum is 35.

The square root of 776816 is about 881.3716582691. The cubic root of 776816 is about 91.9262168348.

The spelling of 776816 in words is "seven hundred seventy-six thousand, eight hundred sixteen".