77804 has 12 divisors (see below), whose sum is σ = 139104. Its totient is φ = 38064.

The previous prime is 77801. The next prime is 77813. The reversal of 77804 is 40877.

It is a hoax number, since the sum of its digits (26) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (77801) 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, 29 + ... + 395.

It is an arithmetic number, because the mean of its divisors is an integer number (11592).

2⁷⁷⁸⁰⁴ is an apocalyptic number.

It is an amenable number.

77804 is a deficient number, since it is larger than the sum of its proper divisors (61300).

77804 is a wasteful number, since it uses less digits than its factorization.

77804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 424 (or 422 counting only the distinct ones).

The product of its (nonzero) digits is 1568, while the sum is 26.

The square root of 77804 is about 278.9336838749. The cubic root of 77804 is about 42.6907687175.

The spelling of 77804 in words is "seventy-seven thousand, eight hundred four".