74432140 has 96 divisors (see below), whose sum is σ = 172440576. Its totient is φ = 26906880.

The previous prime is 74432131. The next prime is 74432143. The reversal of 74432140 is 4123447.

It is not an unprimeable number, because it can be changed into a prime (74432143) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1048305 + ... + 1048375.

It is an arithmetic number, because the mean of its divisors is an integer number (1796256).

Almost surely, 2^74432140 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 74432140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86220288).

74432140 is an abundant number, since it is smaller than the sum of its proper divisors (98008436).

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

74432140 is a wasteful number, since it uses less digits than its factorization.

74432140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199 (or 197 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 25.

The square root of 74432140 is about 8627.4063309896. The cubic root of 74432140 is about 420.6492980451.

Adding to 74432140 its reverse (4123447), we get a palindrome (78555587).

The spelling of 74432140 in words is "seventy-four million, four hundred thirty-two thousand, one hundred forty".