74400447 has 16 divisors (see below), whose sum is σ = 113915520. Its totient is φ = 42717600.

The previous prime is 74400439. The next prime is 74400479.

74400447 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 74400447 - 2³ = 74400439 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74400407) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58704 + ... + 59957.

It is an arithmetic number, because the mean of its divisors is an integer number (7119720).

Almost surely, 2^74400447 is an apocalyptic number.

74400447 is a deficient number, since it is larger than the sum of its proper divisors (39515073).

74400447 is a wasteful number, since it uses less digits than its factorization.

74400447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118694.

The product of its (nonzero) digits is 12544, while the sum is 30.

The square root of 74400447 is about 8625.5693725110. The cubic root of 74400447 is about 420.5895857987.

It can be divided in two parts, 74400 and 447, that added together give a palindrome (74847).

The spelling of 74400447 in words is "seventy-four million, four hundred thousand, four hundred forty-seven".