74784055 has 4 divisors (see below), whose sum is σ = 89740872. Its totient is φ = 59827240.

The previous prime is 74784049. The next prime is 74784091. The reversal of 74784055 is 55048747.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 74784055 - 2⁵ = 74784023 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 74783999 and 74784017.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7478401 + ... + 7478410.

It is an arithmetic number, because the mean of its divisors is an integer number (22435218).

Almost surely, 2^74784055 is an apocalyptic number.

74784055 is a deficient number, since it is larger than the sum of its proper divisors (14956817).

74784055 is a wasteful number, since it uses less digits than its factorization.

74784055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14956816.

The product of its (nonzero) digits is 156800, while the sum is 40.

The square root of 74784055 is about 8647.7774601339. Note that the first 3 decimals coincide. The cubic root of 74784055 is about 421.3111989793.

The spelling of 74784055 in words is "seventy-four million, seven hundred eighty-four thousand, fifty-five".