74344440 has 32 divisors (see below), whose sum is σ = 223033680. Its totient is φ = 19825152.

The previous prime is 74344423. The next prime is 74344447. The reversal of 74344440 is 4444347.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 74344398 and 74344407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74344447) 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, 309649 + ... + 309888.

Almost surely, 2^74344440 is an apocalyptic number.

It is an amenable number.

74344440 is an abundant number, since it is smaller than the sum of its proper divisors (148689240).

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

74344440 is a wasteful number, since it uses less digits than its factorization.

74344440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 619551 (or 619547 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 30.

The square root of 74344440 is about 8622.3221930058. The cubic root of 74344440 is about 420.4840224804.

Adding to 74344440 its reverse (4444347), we get a palindrome (78788787).

The spelling of 74344440 in words is "seventy-four million, three hundred forty-four thousand, four hundred forty".