74417220 has 36 divisors (see below), whose sum is σ = 225732780. Its totient is φ = 19844544.

The previous prime is 74417209. The next prime is 74417221. The reversal of 74417220 is 2271447.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 13483584 + 60933636 = 3672^2 + 7806^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (74417221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 206535 + ... + 206894.

It is an arithmetic number, because the mean of its divisors is an integer number (6270355).

Almost surely, 2^74417220 is an apocalyptic number.

It is an amenable number.

74417220 is an abundant number, since it is smaller than the sum of its proper divisors (151315560).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

74417220 is a wasteful number, since it uses less digits than its factorization.

74417220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 413444 (or 413439 counting only the distinct ones).

The product of its (nonzero) digits is 3136, while the sum is 27.

The square root of 74417220 is about 8626.5416013603. The cubic root of 74417220 is about 420.6211896369.

Adding to 74417220 its reverse (2271447), we get a palindrome (76688667).

The spelling of 74417220 in words is "seventy-four million, four hundred seventeen thousand, two hundred twenty".