74117220 has 24 divisors (see below), whose sum is σ = 207528384. Its totient is φ = 19764576.

The previous prime is 74117213. The next prime is 74117227. The reversal of 74117220 is 2271147.

It is an interprime number because it is at equal distance from previous prime (74117213) and next prime (74117227).

It is not an unprimeable number, because it can be changed into a prime (74117227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 617584 + ... + 617703.

It is an arithmetic number, because the mean of its divisors is an integer number (8647016).

Almost surely, 2^74117220 is an apocalyptic number.

It is an amenable number.

74117220 is an abundant number, since it is smaller than the sum of its proper divisors (133411164).

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

74117220 is a wasteful number, since it uses less digits than its factorization.

74117220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1235299 (or 1235297 counting only the distinct ones).

The product of its (nonzero) digits is 784, while the sum is 24.

The square root of 74117220 is about 8609.1358451357. The cubic root of 74117220 is about 420.0552081622.

Adding to 74117220 its reverse (2271147), we get a palindrome (76388367).

The spelling of 74117220 in words is "seventy-four million, one hundred seventeen thousand, two hundred twenty".