73778 has 8 divisors (see below), whose sum is σ = 113772. Its totient is φ = 35856.

The previous prime is 73771. The next prime is 73783. The reversal of 73778 is 87737.

It can be written as a sum of positive squares in 2 ways, for example, as 61009 + 12769 = 247^2 + 113^2 .

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (73771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 425 + ... + 572.

2⁷³⁷⁷⁸ is an apocalyptic number.

73778 is a deficient number, since it is larger than the sum of its proper divisors (39994).

73778 is a wasteful number, since it uses less digits than its factorization.

73778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1036.

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

The square root of 73778 is about 271.6210595664. The cubic root of 73778 is about 41.9413391201.

The spelling of 73778 in words is "seventy-three thousand, seven hundred seventy-eight".