74525440 has 144 divisors (see below), whose sum is σ = 200148480. Its totient is φ = 26357760.

The previous prime is 74525431. The next prime is 74525441. The reversal of 74525440 is 4452547.

It is not an unprimeable number, because it can be changed into a prime (74525441) 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, 943321 + ... + 943399.

It is an arithmetic number, because the mean of its divisors is an integer number (1389920).

Almost surely, 2^74525440 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 74525440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100074240).

74525440 is an abundant number, since it is smaller than the sum of its proper divisors (125623040).

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

74525440 is a wasteful number, since it uses less digits than its factorization.

74525440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178 (or 164 counting only the distinct ones).

The product of its (nonzero) digits is 22400, while the sum is 31.

The square root of 74525440 is about 8632.8118246606. The cubic root of 74525440 is about 420.8249846616.

Adding to 74525440 its reverse (4452547), we get a palindrome (78977987).

The spelling of 74525440 in words is "seventy-four million, five hundred twenty-five thousand, four hundred forty".