77378 has 8 divisors (see below), whose sum is σ = 132672. Its totient is φ = 33156.

The previous prime is 77377. The next prime is 77383. The reversal of 77378 is 87377.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (77377) 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 in 3 ways as a sum of consecutive naturals, for example, 2750 + ... + 2777.

It is an arithmetic number, because the mean of its divisors is an integer number (16584).

2⁷⁷³⁷⁸ is an apocalyptic number.

77378 is a deficient number, since it is larger than the sum of its proper divisors (55294).

77378 is a wasteful number, since it uses less digits than its factorization.

77378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5536.

The product of its digits is 8232, while the sum is 32.

The square root of 77378 is about 278.1690133714. The cubic root of 77378 is about 42.6127112031.

Subtracting 77378 from its reverse (87377), we obtain a palindrome (9999).

The spelling of 77378 in words is "seventy-seven thousand, three hundred seventy-eight".