76823765 has 16 divisors (see below), whose sum is σ = 99458928. Its totient is φ = 56749056.

The previous prime is 76823759. The next prime is 76823767. The reversal of 76823765 is 56732867.

It can be written as a sum of positive squares in 8 ways, for example, as 1168561 + 75655204 = 1081^2 + 8698^2 .

It is a cyclic number.

It is not a de Polignac number, because 76823765 - 2⁶ = 76823701 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76823767) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 4022 + ... + 13031.

It is an arithmetic number, because the mean of its divisors is an integer number (6216183).

Almost surely, 2^76823765 is an apocalyptic number.

It is an amenable number.

76823765 is a deficient number, since it is larger than the sum of its proper divisors (22635163).

76823765 is a wasteful number, since it uses less digits than its factorization.

76823765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17128.

The product of its digits is 423360, while the sum is 44.

The square root of 76823765 is about 8764.9167138085. The cubic root of 76823765 is about 425.1072670419.

The spelling of 76823765 in words is "seventy-six million, eight hundred twenty-three thousand, seven hundred sixty-five".