74478 has 8 divisors (see below), whose sum is σ = 148968. Its totient is φ = 24824.

The previous prime is 74471. The next prime is 74489. The reversal of 74478 is 87447.

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

74478 is an admirable number.

It is a Curzon number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74471) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6201 + ... + 6212.

It is an arithmetic number, because the mean of its divisors is an integer number (18621).

2⁷⁴⁴⁷⁸ is an apocalyptic number.

74478 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74484).

74478 is a wasteful number, since it uses less digits than its factorization.

74478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12418.

The product of its digits is 6272, while the sum is 30.

The square root of 74478 is about 272.9065774217. The cubic root of 74478 is about 42.0735672095.

The spelling of 74478 in words is "seventy-four thousand, four hundred seventy-eight".