74683478 has 4 divisors (see below), whose sum is σ = 112025220. Its totient is φ = 37341738.

The previous prime is 74683463. The next prime is 74683481. The reversal of 74683478 is 87438647.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 87438647 = 197 ⋅443851.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 18670868 + ... + 18670871.

It is an arithmetic number, because the mean of its divisors is an integer number (28006305).

Almost surely, 2^74683478 is an apocalyptic number.

74683478 is a deficient number, since it is larger than the sum of its proper divisors (37341742).

74683478 is a wasteful number, since it uses less digits than its factorization.

74683478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37341741.

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

The square root of 74683478 is about 8641.9603100223. The cubic root of 74683478 is about 421.1222405754.

The spelling of 74683478 in words is "seventy-four million, six hundred eighty-three thousand, four hundred seventy-eight".