78004 has 6 divisors (see below), whose sum is σ = 136514. Its totient is φ = 39000.

The previous prime is 77999. The next prime is 78007. The reversal of 78004 is 40087.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 67600 + 10404 = 260^2 + 102^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9747 + ... + 9754.

2⁷⁸⁰⁰⁴ is an apocalyptic number.

It is an amenable number.

78004 is a deficient number, since it is larger than the sum of its proper divisors (58510).

78004 is a wasteful number, since it uses less digits than its factorization.

78004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19505 (or 19503 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 19.

The square root of 78004 is about 279.2919619323. The cubic root of 78004 is about 42.7273171735.

The spelling of 78004 in words is "seventy-eight thousand, four".