74438440 has 64 divisors (see below), whose sum is σ = 174389760. Its totient is φ = 28565760.

The previous prime is 74438423. The next prime is 74438449. The reversal of 74438440 is 4483447.

It is a junction number, because it is equal to n+sod(n) for n = 74438396 and 74438405.

It is not an unprimeable number, because it can be changed into a prime (74438449) 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, 214347 + ... + 214693.

It is an arithmetic number, because the mean of its divisors is an integer number (2724840).

Almost surely, 2^74438440 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 74438440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87194880).

74438440 is an abundant number, since it is smaller than the sum of its proper divisors (99951320).

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

74438440 is a wasteful number, since it uses less digits than its factorization.

74438440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 562 (or 558 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 34.

The square root of 74438440 is about 8627.7714387900. The cubic root of 74438440 is about 420.6611657490.

The spelling of 74438440 in words is "seventy-four million, four hundred thirty-eight thousand, four hundred forty".