74386478 has 8 divisors (see below), whose sum is σ = 112164480. Its totient is φ = 36998320.

The previous prime is 74386471. The next prime is 74386483. The reversal of 74386478 is 87468347.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74386471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 96983 + ... + 97746.

It is an arithmetic number, because the mean of its divisors is an integer number (14020560).

Almost surely, 2^74386478 is an apocalyptic number.

74386478 is a deficient number, since it is larger than the sum of its proper divisors (37778002).

74386478 is a wasteful number, since it uses less digits than its factorization.

74386478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194922.

The product of its digits is 903168, while the sum is 47.

The square root of 74386478 is about 8624.7595908524. The cubic root of 74386478 is about 420.5632616573.

The spelling of 74386478 in words is "seventy-four million, three hundred eighty-six thousand, four hundred seventy-eight".