74740224 has 160 divisors (see below), whose sum is σ = 226860480. Its totient is φ = 21676032.

The previous prime is 74740223. The next prime is 74740231. The reversal of 74740224 is 42204747.

It is a super-2 number, since 2×74740224² = 11172202167140352, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 74740191 and 74740200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74740223) 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, 379294 + ... + 379490.

It is an arithmetic number, because the mean of its divisors is an integer number (1417878).

Almost surely, 2^74740224 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 74740224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (113430240).

74740224 is an abundant number, since it is smaller than the sum of its proper divisors (152120256).

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

74740224 is a wasteful number, since it uses less digits than its factorization.

74740224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250 (or 234 counting only the distinct ones).

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

The square root of 74740224 is about 8645.2428537318. The cubic root of 74740224 is about 421.2288726060.

The spelling of 74740224 in words is "seventy-four million, seven hundred forty thousand, two hundred twenty-four".