74444440 has 32 divisors (see below), whose sum is σ = 191429280. Its totient is φ = 25523712.

The previous prime is 74444431. The next prime is 74444441. The reversal of 74444440 is 4444447.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74444441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 132657 + ... + 133216.

It is an arithmetic number, because the mean of its divisors is an integer number (5982165).

Almost surely, 2^74444440 is an apocalyptic number.

74444440 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

74444440 is an abundant number, since it is smaller than the sum of its proper divisors (116984840).

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

74444440 is a wasteful number, since it uses less digits than its factorization.

74444440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265891 (or 265887 counting only the distinct ones).

The product of its (nonzero) digits is 28672, while the sum is 31.

The square root of 74444440 is about 8628.1191461407. The cubic root of 74444440 is about 420.6724677017.

Adding to 74444440 its reverse (4444447), we get a palindrome (78888887).

The spelling of 74444440 in words is "seventy-four million, four hundred forty-four thousand, four hundred forty".