74324220 has 96 divisors (see below), whose sum is σ = 214824960. Its totient is φ = 19192320.

The previous prime is 74324209. The next prime is 74324279. The reversal of 74324220 is 2242347.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 310861 + ... + 311099.

It is an arithmetic number, because the mean of its divisors is an integer number (2237760).

Almost surely, 2^74324220 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 74324220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (107412480).

74324220 is an abundant number, since it is smaller than the sum of its proper divisors (140500740).

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

74324220 is a wasteful number, since it uses less digits than its factorization.

74324220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 395 (or 393 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 24.

The square root of 74324220 is about 8621.1495753177. The cubic root of 74324220 is about 420.4458983210.

Adding to 74324220 its reverse (2242347), we get a palindrome (76566567).

The spelling of 74324220 in words is "seventy-four million, three hundred twenty-four thousand, two hundred twenty".