74428047 has 12 divisors (see below), whose sum is σ = 107800264. Its totient is φ = 49483440.

The previous prime is 74428031. The next prime is 74428049. The reversal of 74428047 is 74082447.

It is not a de Polignac number, because 74428047 - 2⁴ = 74428031 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74428049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7729 + ... + 14442.

Almost surely, 2^74428047 is an apocalyptic number.

74428047 is a deficient number, since it is larger than the sum of its proper divisors (33372217).

74428047 is a wasteful number, since it uses less digits than its factorization.

74428047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22550 (or 22547 counting only the distinct ones).

The product of its (nonzero) digits is 50176, while the sum is 36.

The square root of 74428047 is about 8627.1691185464. The cubic root of 74428047 is about 420.6415874461.

The spelling of 74428047 in words is "seventy-four million, four hundred twenty-eight thousand, forty-seven".